Complete
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1 8 10 15 17 21 23 2 12 18 3 13 9 19 4 24 5 11 20 22 6 14 7 16
  1. 1a Old banger (6)
  2. 4a Undies (6)
  3. 8a Spanish bites? (5)
  4. 9a Bewilder (7)
  5. 10a State represented by Senators Barry Goldwater and John McCain (7)
  6. 11a Useful possession (5)
  7. 12a Temporary access to a docked vessel (9)
  8. 17a Close-fitting (5)
  9. 19a Venetian taxi? (7)
  10. 21a Heads (of a coin) (7)
  11. 22a Voucher (5)
  12. 23a Rinse the throat (6)
  13. 24a Semi-liquid mixture of water and cement or manure, say (6)
  14. 1d Body's disruption after a long flight (3,3)
  15. 2d Large plover (7)
  16. 3d Green sauce (5)
  17. 5d North-western state bordering Canada (7)
  18. 6d Name of eighteen undisputed kings of France (5)
  19. 7d Perspiring (6)
  20. 9d Fizz (9)
  21. 13d Innate — unprocessed (7)
  22. 14d It bangs on a door (7)
  23. 15d Potent (6)
  24. 16d Cheerful (6)
  25. 18d Donor (5)
  26. 20d About birth (5)