Complete
00:00:00
6 8 10 13 16 19 21 7 1 18 17 2 9 15 14 3 12 20 11 4 5
  1. 1a Stubbornly persistent (or boarish?) (9)
  2. 8a Sudden involuntary movement (5)
  3. 9a Unfortunate events (7)
  4. 10a A white one's useless (and expensive) (8)
  5. 11a Gentle creature (4)
  6. 13a Headgear (informal) (6)
  7. 14a Diverse (6)
  8. 16a Weaponry (4)
  9. 17a Winter sports shoe (3,5)
  10. 19a Direct phone for use in emergencies (7)
  11. 20a Keepsake (5)
  12. 21a Nimble — energetic (9)
  13. 1d Brochure (8)
  14. 2d Playing on computers or other electronic devices (6)
  15. 3d A walk in the park? (4)
  16. 4d In an impressive manner (12)
  17. 5d Insubordinate behaviour (12)
  18. 6d 1980 David Bowie song (5,2,5)
  19. 7d Consumer warning (6,6)
  20. 12d One who does not emulate the Good Samaritan? (6-2)
  21. 15d Distinctive way of speaking (6)
  22. 18d Annexe to a building (4)