Complete
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8 10 13 16 6 5 19 1 17 2 9 14 3 11 15 4 12 18 7
  1. 5a Four-footed mammal (9)
  2. 8a Recreational area (4)
  3. 9a Utter (8)
  4. 10a Not sinking (6)
  5. 11a Surviving (6)
  6. 13a Teaser (6)
  7. 15a Focus obsessively (on) (6)
  8. 16a Someone who has people for dinner? (8)
  9. 18a Part of the foot (4)
  10. 19a Indolent person (9)
  11. 1d Easy but deleterious dietary option (4,4)
  12. 2d Skilful (6)
  13. 3d Finely nuanced (6)
  14. 4d Mythical mountain-dweller (4)
  15. 6d Loyal assistant, as seen in a 1719 novel (3,6)
  16. 7d Study of speech sounds (9)
  17. 12d Place to avoid high levies (3,5)
  18. 14d Early stage of an organism’s development (6)
  19. 15d Bird of prey (6)
  20. 17d Boat-building patriarch (4)