Welcome to Florey's Cryptic College! We hope that you will learn some tips and tricks for cracking cryptic crosswords, on your way to becoming a capable cruciverbalist! This series consists of five puzzles, each with a corresponding cryptic crossword, going from easier to harder. Each cryptic has a theme, that you will need to unravel to solve the crossword. A remark about the theme is given above the crossword grid.
The fifth and final such crossword is below. There are no hints for this puzzle: it is a D5 after all.

Once you have solved the above, all that remains is one final riddle to unravel. (5,3,4,2,3,4,5)
(22D,1), (8A,11), (20D,6), (10A,4), (12A,5)
(1D,4), (26A,9), (3D,5)
(23D,3), (16A,4), (25A,8), (11A,5)
(17D,7) - 1, (24A,3)
(5D,2), (5D,9), (15D,3)
(21A,1), (14A,5), (19A,8), (7D,6)
(18D,7), (13D,1), (4D,1), (6D,4), (9A,5)
The secret message that results will yield the final coordinates, once you enter it into Certitude. No spaces required.

You can validate your puzzle solution with certitude.
The cache itself is large, and something special to round out this series. A pen is included, along with plenty of room for swaps (of almost any size you can imagine). Thanks must be given to the fellow cacher who generously gifted it to us. Please replace exactly as found.