Complete
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1 8 10 13 17 21 24 2 18 3 12 11 4 16 22 14 5 9 20 19 6 15 7 23
  1. 1a Competition based on appearances (6,7)
  2. 8a Go house to house singing Christmas carols (7)
  3. 9a Nincompoop (5)
  4. 10a Lateen-rigged Arab sailing vessel (4)
  5. 11a Defeat in debate (8)
  6. 13a Useful little gadget (6)
  7. 14a Book page size — a CV too (anag) (6)
  8. 17a Sensory organ — pro-Crete (anag) (8)
  9. 19a Small restaurant (4)
  10. 21a Gesture of contempt (or success?) (1-4)
  11. 22a Hunting cry (5-2)
  12. 24a Big dipper (6,7)
  13. 1d Arrow shooter (3)
  14. 2d Escape (7)
  15. 3d Freshwater duck (4)
  16. 4d Hue (6)
  17. 5d Annoying thing (8)
  18. 6d Giving (somebody) the once-over (5)
  19. 7d Lead part (5,4)
  20. 10d Towards the mouth? (9)
  21. 12d Answer (8)
  22. 15d Expert in studying data (7)
  23. 16d Lyrical (6)
  24. 18d Lose heat (5)
  25. 20d Little high-jumping bloodsucker (4)
  26. 23d Belonging to you and me (3)