Complete
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1 8 11 14 18 20 22 2 19 17 10 3 9 4 16 15 5 21 23 6 12 7 13
  1. 1a American pioneer of mass car production, d. 1947 (4)
  2. 3a Terraced houses built to form an arc (8)
  3. 8a Security feature — hair piece? (4)
  4. 9a Black and white cattle breed (8)
  5. 11a Silly behaviour (10)
  6. 14a Beam over a doorway (6)
  7. 15a Bay opening off a room (6)
  8. 17a Destitute (4-3-3)
  9. 20a God's act of bringing the universe into existence (8)
  10. 21a Brief satirical sketch (4)
  11. 22a Made bigger (8)
  12. 23a Spoken (4)
  13. 1d Flat out (4,4)
  14. 2d North Yorkshire market town — London borough (8)
  15. 4d Seldom (6)
  16. 5d Declare emphatically (5,5)
  17. 6d Leave by a slip road (4)
  18. 7d Wee (4)
  19. 10d Let's Do It songwriter (4,6)
  20. 12d Colleague (2-6)
  21. 13d Eschewing all booze (8)
  22. 16d Catnap (6)
  23. 18d 4,840 square yards (4)
  24. 19d Sense physically or emotionally (4)