Complete
00:00:00
1 9 12 13 17 20 22 11 2 18 3 23 4 10 16 14 8 21 5 6 15 7 19
  1. 1a Undergarment with shoulder straps (8)
  2. 5a Smile (from ear to ear?) (4)
  3. 9a Old European gold coin (5)
  4. 10a Insulating layer of fat (7)
  5. 11a Policy of non-interference (7-5)
  6. 13a Wiggle room (6)
  7. 14a Our second largest continent (6)
  8. 17a I leave goblet (anag) (9,3)
  9. 20a One providing the food and drink (7)
  10. 21a Country whose last king (for 34 days) was Umberto II (5)
  11. 22a Glimpse (4)
  12. 23a Deliberate wrecker (8)
  13. 1d Give up (4)
  14. 2d Knotting art (7)
  15. 3d Passable (12)
  16. 4d Supporter of a UK political party founded in 1988 (abbr) (3-3)
  17. 6d Jewish teacher (5)
  18. 7d Viking (8)
  19. 8d Body of water — go off clue mix (anag) (4,2,6)
  20. 12d Bone linking scapula and sternum (8)
  21. 15d Impersonate (7)
  22. 16d Portugal and Spain together (6)
  23. 18d __ __ and go! (3,2)
  24. 19d Person who colours cloth (4)