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 Cain's crime (10)
  2. 7a Prehistoric (8)
  3. 8a Unyielding (4)
  4. 9a Author of Das Kapital (4)
  5. 10a Daily record of events (7)
  6. 12a Formal and explicit approval (11)
  7. 14a First Soviet earth satellite, 1957 (7)
  8. 16a Strong restless desire (4)
  9. 19a Forehead (4)
  10. 20a Anti-British demonstration in Boston, Mass, 1773 (3,5)
  11. 21a Toasted Italian bread with a savoury topping (10)
  12. 1d Arena for public debate (5)
  13. 2d Highly regarded (7)
  14. 3d Keep moving (4)
  15. 4d Battle that ended Bonnie Prince Charlie's Jacobite uprising of 1745–6 (8)
  16. 5d Postpone (5)
  17. 6d Chicken portion (6)
  18. 11d Theatrical performers (8)
  19. 12d Dab hand (6)
  20. 13d Pioneer American aviator, who disappeared with her navigator in the Pacific, 1937 (7)
  21. 15d Tall building (5)
  22. 17d Run scored at cricket but not off the bat (5)
  23. 18d Pedestrian way (4)