Complete
00:00:00
1 9 11 15 21 23 12 2 16 3 13 4 8 10 17 22 24 5 18 6 19 14 7 20
  1. 1a Thrive (7)
  2. 8a Formal male title (7)
  3. 9a Unassertive male (informal) — limps OK (anag) (7)
  4. 10a Insatiable desire for wealth (7)
  5. 11a Register (5)
  6. 13a Criminal — clarinets (anag) (9)
  7. 15a One of a hairy venomous family of spiders (9)
  8. 18a See (an eyesore?) (5)
  9. 21a Bitter container (4,3)
  10. 22a Structure with roof and walls (7)
  11. 23a French post-Impressionist, d. 1903 (7)
  12. 24a Female feline (7)
  13. 1d French apple (5)
  14. 2d Tanker carrying crude (5)
  15. 3d Timid (13)
  16. 4d Rectify (6)
  17. 5d Endless military drill (informal) (6-7)
  18. 6d Female swimsuit (6)
  19. 7d Shortcoming (6)
  20. 12d US space research agency (4)
  21. 14d Heaving sound, usually made with shoulders moving (4)
  22. 15d Trinidad's island partner (6)
  23. 16d Contrite (6)
  24. 17d Pressing (6)
  25. 19d Move smoothly and effortlessly (through the air?) (5)
  26. 20d Tartan trousers worn by Scottish regiments (5)