Complete
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7 9 16 17 20 22 1 12 13 2 18 3 10 23 8 11 21 4 14 19 5 15 6
  1. 1a Take-off (6)
  2. 4a Symbol of love (5)
  3. 7a Informal discussion (abbr) (6)
  4. 8a Summon by gesture (6)
  5. 9a Queen of the Olympian gods in Greek mythology (4)
  6. 10a Mausoleum built by the emperor Shah Jahan in memory of his favourite wife (3,5)
  7. 12a Fruit and ice cream dessert (6,5)
  8. 17a Hair-plucking tool (8)
  9. 19a Send naughty internet messages (4)
  10. 20a Dried fruit (6)
  11. 21a Contaminate (6)
  12. 22a Throw with great effort — retch (5)
  13. 23a First US space station, launched 1973 (6)
  14. 1d Condensed and memorable saying (7)
  15. 2d Desist (7)
  16. 3d Woman making her first appearance (9)
  17. 4d Eric Clapton's rock band, formed 1966 (5)
  18. 5d Chinese cabbage — oak chip (anag) (3,4)
  19. 6d Hang freely (6)
  20. 11d Slender Chinese incense-coated item (4,5)
  21. 13d Amerigo Vespucci's great discovery (7)
  22. 14d Lecherous (7)
  23. 15d Vehicle for hire (7)
  24. 16d Carbohydrate in food (6)
  25. 18d Belgian central African colony until 1960 (5)