Complete
00:00:00
7 9 13 16 5 18 1 10 2 8 15 14 3 12 11 4 17 6
  1. 5a Heavy metal fan's performance? (11)
  2. 7a Ask God? (4)
  3. 8a Archaic (8)
  4. 9a Besotted (7)
  5. 11a Stockpile (5)
  6. 13a Spoonful — exclusive story (5)
  7. 14a Notion (7)
  8. 16a Fire lighter (8)
  9. 17a Low dam across a river to raise its level upstream (4)
  10. 18a Remedy guaranteed to cure (5,6)
  11. 1d Suspicious (4)
  12. 2d Stomach (7)
  13. 3d Oneness (5)
  14. 4d Mammoth (8)
  15. 5d Cheerfully irresponsible (5-6)
  16. 6d Make-up for actors (11)
  17. 10d Rigorous (8)
  18. 12d Line on a map connecting points of equal elevation (7)
  19. 15d Letter that's regularly dropped! (5)
  20. 17d Wild carnivore (4)