Complete
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6 7 10 13 17 21 23 1 14 2 12 11 3 16 22 15 4 8 20 18 5 19 9
  1. 1a Imperious (4-6)
  2. 7a Heads (as opposed to tails) (7)
  3. 8a Lost in France (5)
  4. 10a Defy (the system) (4)
  5. 11a Means to buy a cheaper train ticket (8)
  6. 13a Ground water? (6)
  7. 15a Excellent specimen (6)
  8. 17a Quickly – and willingly (2,1,5)
  9. 18a Counterpart (4)
  10. 21a Correct text (5)
  11. 22a Take turns to drive in one? (3,4)
  12. 23a Having an over-optimistic view (6-4)
  13. 1d Devastation (5)
  14. 2d 1965 Beatles song (4)
  15. 3d Sound of braying (3-3)
  16. 4d Tyrant of Orwell's Animal Farm (8)
  17. 5d Set aside (7)
  18. 6d Last award? (5,5)
  19. 9d Gangland (10)
  20. 12d Flat fish (8)
  21. 14d Most precious (7)
  22. 16d Not simple (6)
  23. 19d Jutting out (5)
  24. 20d Horse-drawn cart (4)