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 Uncommunicativeness (9)
  2. 8a Academic qualification in England, Wales and Northern Ireland (initials) (4)
  3. 9a Blessed using oil (8)
  4. 10a Church changing room (6)
  5. 11a (In times of stress) with self-possession (6)
  6. 13a William ___ , English motor manufacturer, later Lord Nuffield, d. 1963 (6)
  7. 15a Leave (6)
  8. 16a Rabid owl (anag) — animal from which most domestic pigs are descended (4,4)
  9. 18a A horse's gait (4)
  10. 19a One looks on (9)
  11. 1d Mine, metal or smoke? (8)
  12. 2d Long catalogue (6)
  13. 3d Courageous (6)
  14. 4d Once-over (4)
  15. 6d Hardening of tissue or a body part (9)
  16. 7d Noted pile (anag) — exhaustion (9)
  17. 12d Placement (8)
  18. 14d Walk in a slovenly way (6)
  19. 15d Using the spoken word (6)
  20. 17d Trick (4)