Complete
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7 14 19 1 9 12 21 2 15 3 11 20 10 4 18 16 5 8 13 6 17
  1. 1a Venerated figure after whom a Missouri city was named (5,5)
  2. 7a Strong, defensive fence (8)
  3. 8a Prosperous period (4)
  4. 9a Overly inquisitive (4)
  5. 10a Live together (7)
  6. 12a Pyongyang native, say (5,6)
  7. 14a Come up trumps (7)
  8. 16a Lessening of hostility (4)
  9. 19a Burn the outside of (4)
  10. 20a Avoidance of punishment (8)
  11. 21a Large wine bottle – 969-year-old man (10)
  12. 1d Protested (3,2) – Smooth fabric (5)
  13. 2d Front tooth (7)
  14. 3d Perfectly (2,1,1)
  15. 4d Schiller poem used by Beethoven (3,2,3)
  16. 5d Where emails arrive (5)
  17. 6d Deteriorate (6)
  18. 11d Contrite (8)
  19. 12d Sickness – Sartre’s first novel (6)
  20. 13d Intoxicating compound in alcoholic drinks (7)
  21. 15d Cut into pieces (5)
  22. 17d Sorceress (5)
  23. 18d Artistic work (4)