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 Hale and hearty? (4-6)
  2. 7a Scram! (7)
  3. 8a Curved sword (5)
  4. 10a Batons (4)
  5. 11a Hertfordshire cathedral city (2,6)
  6. 13a Cover on a car wheel (6)
  7. 15a Spread all over the place (6)
  8. 17a End of the line (8)
  9. 18a ___ Laine, jazz and pop singer (4)
  10. 21a (Originally RAF slang for a) crash (5)
  11. 22a Grouse (7)
  12. 23a Lying (10)
  13. 1d Provided with weapons (5)
  14. 2d Landlocked Asian socialist country (4)
  15. 3d Air intake (that one may want to save?) (6)
  16. 4d Forlorn (8)
  17. 5d Hug (7)
  18. 6d Excessive (4,3,3)
  19. 9d US president, 1953-61 (10)
  20. 12d Pretend to be ill (8)
  21. 14d Good buy (7)
  22. 16d Financial plan (6)
  23. 19d Defamation (5)
  24. 20d Browse the internet (4)