Cryptic 8

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Across
  1. 3. was tempting first two to squander (5)
  2. 7. engrossed in crabs or bedbugs (8)
  3. 9. huge loss in coal (8)
  4. 13. dreadful part of directory (4)
  5. 15. a nut in dismal Monday crowd (6)
  6. 16. holy unit of land area within standard limit (6)
  7. 18. tense time ahead (6)
  8. 19. freezing tent accessory or sweet on a stick (3,4)
  9. 20. large rock sounds more courageous (6)
Down
  1. 1. run in masculine time (6)
  2. 2. animal worker has nothing to reject a proposal(4)
  3. 4. small hook trembled (5)
  4. 5. bin, as in sink (5)
  5. 6. criminal delivered agreement (7)
  6. 8. it's a number, understand? (5)
  7. 10. plasticise most of bleater in a musical note (8)
  8. 11. control over in German borders (6)
  9. 12. reportedly useful headwear, but really a burden (8)
  10. 14. escaped with hale hearts to major city (7)
  11. 17. father lies between poles to form a bridge (4)