Complete
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7 9 11 14 18 21 1 24 2 12 3 19 22 4 13 17 15 5 16 20 6 10 23 8
  1. 1a Instrument that records what's happening to the heart (11)
  2. 9a Something most eagerly sought or pursued — lily or hag (anag) (4,5)
  3. 10a Obtain for money — accept as true (3)
  4. 11a Adjust again (to zero) (5)
  5. 13a Straighten out (7)
  6. 14a Inessential, though desirable, item (6)
  7. 15a Hound (from Kabul?) (6)
  8. 18a Learned type (7)
  9. 20a One of 78 in a pack of cards (5)
  10. 21a (To a psychoanalyst) the conscious mind (3)
  11. 22a Unrestricted by reservations (9)
  12. 24a Little bits (11)
  13. 2d Wholly (3)
  14. 3d Common name for Sirius (Alpha Canis Majoris) (3,4)
  15. 4d Unclear (6)
  16. 5d Fired up again (5)
  17. 6d HarperCollins or Simon & Schuster, say (9)
  18. 7d One of few final candidates (11)
  19. 8d Science of communications — cynic's beret (anag) (11)
  20. 12d Last two years of school classes (5,4)
  21. 16d Tiredness (7)
  22. 17d Squirm (6)
  23. 19d Abiding by the law (5)
  24. 23d Moved fast (3)