Complete
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7 9 13 16 5 18 1 10 2 8 15 14 3 12 11 4 17 6
  1. 5a Pack in act at (anag) – onset of anxiety (5,6)
  2. 7a Pavement edge (4)
  3. 8a Devoted to one’s wife (8)
  4. 9a Past events – (they’re) no longer important (7)
  5. 11a Things to click online (5)
  6. 13a (Old-fashioned) delay (5)
  7. 14a Under the influence (7)
  8. 16a Pessimistic (8)
  9. 17a School-leavers’ event (4)
  10. 18a Economic theory arguing that making the rich richer benefits everyone (7-4)
  11. 1d Slight (4)
  12. 2d One specialises in calculated risks (7)
  13. 3d Raptor’s high-speed dive – American porch (5)
  14. 4d Cricket ground building (8)
  15. 5d Jam – or pickle? (11)
  16. 6d Apply oneself (7,4)
  17. 10d Acid found in baking powder (8)
  18. 12d Cold storage (7)
  19. 15d Hard to please (5)
  20. 17d That stinks! (4)