Complete
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8 9 11 14 18 22 24 1 2 19 3 13 12 4 10 17 15 5 21 23 20 6 16 7
  1. 1a Almost impossible to comprehend (4-8)
  2. 9a Logo — pattern (5)
  3. 10a Shipment from A to B (7)
  4. 11a Deliberately have no contact with (4)
  5. 12a Finnish capital (8)
  6. 14a Largest city in Syria before the massive damage of the civil war (6)
  7. 15a Cherry brandy (6)
  8. 18a Republican's US rival (8)
  9. 20a Recognised leader in some field (4)
  10. 22a Admonish (7)
  11. 23a Short coat (5)
  12. 24a Swimming style (12)
  13. 2d Stick one's nose in (7)
  14. 3d Pudding — useless — Homer Simpson's kind of beer (4)
  15. 4d Start (6)
  16. 5d Leather from nanny or billy? (8)
  17. 6d Author of The Master Builder, d. 1906 (5)
  18. 7d Kind of financial proposal with no realistic chance of success (3-4-5)
  19. 8d Style of robbery through a broken display window (5-3-4)
  20. 13d Deceptively pleasing (8)
  21. 16d Soviet satellite, launched 1957 (7)
  22. 17d Stroke gently (6)
  23. 19d Tree providing Canada's national emblem (5)
  24. 21d A night light? (4)