Complete
00:00:00
7 14 19 1 9 12 21 2 15 3 11 20 10 4 18 16 5 8 13 6 17
  1. 1a Greek tragedy (7,3)
  2. 7a A year (3,5)
  3. 8a Elliptical shape (4)
  4. 9a Feeling of discomfort (4)
  5. 10a Kernel (7)
  6. 12a Safety equipment for a biker, say (5,6)
  7. 14a Perform tricks (7)
  8. 16a Prickly seed case (4)
  9. 19a Squad (4)
  10. 20a Impasse (8)
  11. 21a Mess (4,6)
  12. 1d Greek letter (5)
  13. 2d Greek money, formerly (7)
  14. 3d Small and weak (4)
  15. 4d Academic term (8)
  16. 5d Call up (5)
  17. 6d Surgical knife (6)
  18. 11d Parlour game (8)
  19. 12d Bragged (6)
  20. 13d Schmaltzy (7)
  21. 15d Huge (5)
  22. 17d Fast car or fast driver (5)
  23. 18d Travellers who followed a star (4)