Complete
00:00:00
7 9 13 16 5 18 1 10 2 8 15 14 3 12 11 4 17 6
  1. 5a Wish someone harm (4,3,4)
  2. 7a Apparatus used by women gymnasts (4)
  3. 8a Exceeds in height (8)
  4. 9a In one's real nature — a threat (anag) (2,5)
  5. 11a Muscular (5)
  6. 13a Breaks under tension (5)
  7. 14a Imposing residence (7)
  8. 16a Taking place every other year (8)
  9. 17a Display one's buttocks publicly (slang) (4)
  10. 18a Reply that has no relevance to what was said before (3,8)
  11. 1d Conceal in the hand (4)
  12. 2d Intolerance (7)
  13. 3d Naval force (5)
  14. 4d Suffering (8)
  15. 5d Taking the same line of argument further (2,9)
  16. 6d Winner's ceremonial circuit of the track (3,2,6)
  17. 10d Practitioner (8)
  18. 12d Quarrel (4,3)
  19. 15d Bathroom facility (5)
  20. 17d Speechless (4)