Complete
00:00:00
7 9 16 17 20 22 1 12 13 2 18 3 10 23 8 11 21 4 14 19 5 15 6
  1. 1a Reliable (6)
  2. 4a Is art (anag) (5)
  3. 7a Annul (6)
  4. 8a Car running on petrol and electricity, say (6)
  5. 9a One goes on foot (4)
  6. 10a Early deliverer of the news (8)
  7. 12a Work of art set in the past (6,5)
  8. 17a Crestfallen (8)
  9. 19a One of four English rivers (of which one is Great and another Little) (4)
  10. 20a To some extent (2,1,3)
  11. 21a Hebrew prophet of the Old Testament, who was taken up to heaven in a chariot of fire (6)
  12. 22a Tendency (5)
  13. 23a Forge (6)
  14. 1d Cafe (3,4)
  15. 2d Ill-defined (7)
  16. 3d Transmitting speech and data electronically (9)
  17. 4d Chic (5)
  18. 5d Using oxygen to produce energy (7)
  19. 6d A long overnight flight (6)
  20. 11d Vain hope (4,5)
  21. 13d Subjugate (7)
  22. 14d So get it (anag) (7)
  23. 15d MDMA (7)
  24. 16d One hooked on 15? (6)
  25. 18d Oscar or Tony? (5)