The cache is not at the posted coordinates.
Solve three crosswords and make a MD5 hash by reading the letters off the completed grids from top left to bottom right, starting from the first completed grid. Put the hash into the checker to get the coords. Simple.
The amount of material on the internet that will help you learn how to do cryptic crosswords is immense. If you've never solved one before, try working with a friend who has some experience in the arcane world of the cruciverbal. Large language models have come a long way in the ability to solve cryptic clues recently, so if you want a virtual helper whose second or third suggestion is often the right one, there are several options there too.
Thanks to ZQX for making the puzzles. Thanks to muggles A and G for testing the first puzzle. Thanks to frilk for testing all three puzzles. Thanks to Fatoz for help with deployment.
Here's the grid. You need to use it three times.
Clues
Crossword one
ACROSS
1. Around 14000 Irish folk bump off Schwarzenegger in audition (9)
6. Database language A (5)
9. Steak first to last dessert (5)
10. Mischievous eaglet springs off tree, shows us where we are (1.1.1.,6)
11. Count holding a very quiet petition, again (7)
12. Early Internet Exchange point for much earlier actress (3,4)
13. Curry, not me, followed firm metal (6)
14. Old lakeside intensity about Penrith venue (1,7)
17. Backlash concerning bus network (8)
19. Nimble French to the right, without energy (6)
22. Without comebacks, featuring derivative (7)
24, 27. Resident of British Museum climbed, double-time, like ambience (7,5)
26. Hard-to-shoot spots? Yes. Arrived earlier (6-3)
28. Each emergency service reduces impact (5)
29. Grab chain repaired for Miranda East? (9)
DOWN
1. See 6D
2. Politician admits intimate writing (6,1)
3. Perfect place nearly in heaps, George (9)
4. Asian city essentially pays yoga fans back (6)
5. Hey, truck Lawrence to old park (8)
6, 1D. OK. Liberace turbulently made early inroads into 2D. (5,5)
7. Writer on trial for cyber security activity (3,4)
8. Plot of rental lot mentioned in part (9)
10. In favour of measurement, thus scientifically used in court (8)
13. Gun cartridge responsibility included brush (9)
15. Dragon book, satisfactory, activated Reuben for example (6,3)
16. In favour of measurement, thus Latin science used in courtrooms (8)
18. Diana recently saw dark side of satellite (7)
20. Secondary scheme: Select a moon of Jupiter. Note well (6,1)
21. 20D for lapsed agnostic? (6)
23. Our grandad reacts extra slyly, faces beasts (5)
25. Help a converted 6A in Jerusalem (5)
Crossword two
ACROSS
1. Regulator is one of Gerry's associates (9)
6. Kind of 19A for painter (6)
9. Renovating, stripped of residue seal (1-4)
10. Renee Pink, 14A host (9)
11. Scandanavian journo in stylish surroundings (7)
12. Lethal asp putting some back in 11A town (7)
13. Short-lived birdman Nick Ward must remove wings (6)
14. West exchanged debut for a fluke (8)
17. Somehow faces her collaborator with 4D (8)
19. See 7D.
22. Ms Ryan? Affirmative. One 11A 19A expert (7)
24A. Quiet Indian city (orient's last) for inhabitant of Middle Earth (7)
26. Lighten Aluminium 16D after temperature dropped (9)
27. Incompetent Vinnie regularly falls out with gym employee (5)
28. New York city, without monarch for a long time (5)
29. Old duke off with another old duke (9)
DOWN
1. Tramps slopped awkwardly, slipped disc (5)
2. Ancient hybrid of instrument and solar power? (7)
3. Importance of attractive metal you had reported (9)
4. Conquerer of 7D 19A dark period reportedly (6)
5. Kick dubious rune once (8)
6. Follower of a former PM brought back TV's curse (5)
7D, 19A. 1700s mystery: Police officer #1 (bloke) discovered nothing (7,6)
8. Cyclone Ron returned before long weekend (3'6)
13. Dictated 10A's responsibility. Brief version for conclusion's beginning. (2,7)
15. Phony Miami is that twin of NY intermittently (9)
16. Old priest embraces a time to rise (8)
18. 27A healing 11A 19A device designer (7)
20. Pick, nearly damage, waistcoat... (7)
21. …a stylish person too (2,4)
23. The King in the grip of tunnel vision (5)
25. Greek deity sounded tense (5)
Crossword three
ACROSS
1. Switches fake tattoos (9)
6. Versatile voice actor broadcast nothing (5)
9. Escaped alien hides accelerator (5)
10. Milk producer Ray Friedman disposed of English 17A (5,4)
11. Frenzy/anger about one politician (7)
12. Has Kel lied, smuggling one of Miranda's successors? (7)
13A, 24A Eliminate real cryptic writing from 2000 BC (6,7)
14. Misguided chorister taking Sunday off for oration (8)
17. About Piglet's home: small light worked again (8)
19. 13A 24A expert of the French collection (6)
22. Significant furniture is missing? (7)
24. See 13A.
26. Insiders of Stephen Clemens morally short-lived (9)
27. Royal Australian Regiment kidnapped notorious setter/tracker (5)
28. Roll back caching goals (5)
29. Hacienda resort some hated (9)
DOWN
1. Gradually decrease old source of light (5)
2. Midsection of ARL senior blokes (7)
3. 13A 24A for example on outskirts of Sydney, centre of disallowed one-degree tracks (9)
4. Maelstroms decaptitating plush toys (6)
5. Key used by 19A: left half of coin, lol (8)
6. Quoted Russet's theory of probability (5)
7. Shoddy and unprofessional (7)
8. Sinful, obliging article to be exchanged for counter-intelligence (9)
13. Treatment of an allergy of the vocal tract (9)
15. He is absorbed by star sign but it's all about semantics (9)
16. Hunt once more for papers (8)
18. Spooner's game thus for jazz legend (7)
20. Warnie was the master of this valley without a stick (7)
21. Material sound of Scotland raised after Commodore (6)
23. Knocks nodule (5)
25. Um, Ruby made a mistake (5)
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