Complete
00:00:00
8 10 13 16 6 5 19 1 17 2 9 14 3 11 15 4 12 18 7
  1. 5a Warning involving a threat (9)
  2. 8a Mind – acre (anag) (4)
  3. 9a Pay attention (4,4)
  4. 10a And that’s the end of it (in the US) (6)
  5. 11a Steep-sided valley (6)
  6. 13a Wider at the bottom (6)
  7. 15a Prominence (6)
  8. 16a Victory for Nelson at Trafalgar, say (8)
  9. 18a Coast, coin or card? (4)
  10. 19a Random (9)
  11. 1d Concealed (motive) (8)
  12. 2d Able (6)
  13. 3d A safe bet (6)
  14. 4d Pull a face (4)
  15. 6d Pond flower (5,4)
  16. 7d Refuse to answer questions so as to delay or prevent something (9)
  17. 12d Like a sour-tasting wine? (8)
  18. 14d Brightly-coloured flower, grown from a tuber (6)
  19. 15d Sound of gunfire (6)
  20. 17d The start (of an idea) (4)