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. 1 a Someone no longer required (4,4)
  2. 5 a Tiny bit (4)
  3. 9 a Single figure (5)
  4. 10 a Continuing indefinitely (7)
  5. 11 a -273.15 Celsius (8,4)
  6. 13 a Generous (meal?) (6)
  7. 14 a Insouciant (6)
  8. 17 a (French?) trifle (7,5)
  9. 20 a Organ; examine closely (7)
  10. 21 a As spinach, cabbage or a tree? (5)
  11. 22 a Protein-rich plant (4)
  12. 23 a Oz city (8)
  13. 1 d Ashmolean's extinct bird (4)
  14. 2 d Branch of maths (7)
  15. 3 d Peerless (7,5)
  16. 4 d Impenetrable (6)
  17. 6 d Ether (anag.) (5)
  18. 7 d Inaccurate term (8)
  19. 8 d LA suburb (7,5)
  20. 12 d PM's retreat (8)
  21. 15 d Fried tortilla dish (7)
  22. 16 d Wine store (6)
  23. 18 d Dirge (5)
  24. 19 d Computer storage unit (4)

Across

Down