NOTE: The listed coordinates are NOT the position of the cache. You must solve the puzzle below to determine the actual coordinates of the cache.
Having attempted to prepare the way with a pair of tutorials (GCAP4R6 and GCARYKQ) I, with trepidation, present a cryptic crossword for your enjoyment. For the cache coordinates, take the green letters (mod10) left to right for the latitude minutes and the pink letters (mod10) top to bottom for the longitude minutes.
Here is a PDF version for printing, and here is a Google Sheets version for online solving.
As the cache owner, I assure you that these files are safe to download, although they have not been checked by Groundspeak for malicious content. Download at your own risk.
Across
1. Objective: a spear in bejewelled wrappings
6. A cudgel, quickly!
7. Endlessly carry ex-Raider QB
8. Switch designers? Nine in ten do (one German abstains)
11. Heard strangely silent Ed
12. Rudeness confused customers
14. Rebuked, rein in Dorothy's dog
15. Turns moist after starting elevator company
16. Once again an antelope spoke
17. Gossip about all but one messy makeup item
Down
1. Be persnickety, mundane
2. Hatless Lenin is a revolutionary, silly!
3. Randomly update its abilities
4. Pelican in estuary has teeth
5. Delete article introducing cyborg R2D2, for instance
7. Immortal agitates lice least
9. Left initially delirious in band's drug-induced high
10. Chastises, confuses, retables without loss
12. Commend former lover to leaders of Texas, Oklahoma, and Louisiana
13. Drag between two small stashes
You can validate your puzzle solution with
certitude.