Cryptic 7

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Across
  1. 4. hair problem hiding in public enemy (4)
  2. 6. dislike being posted again (6)
  3. 9. apply salt to spring (6)
  4. 10. shift men to first motion (8)
  5. 11. less inside admin users (5)
  6. 12. half-strong acid mix is disastrous (7)
  7. 13. most inferior left direction (4)
  8. 16. small kangaroo is a store visitor(7)
  9. 17. troubled dear seen in song to loved one (8)
  10. 18. cut down on relaxation and become agitated (8)
  11. 20. small deficiency is pretty loose (5)
Down
  1. 1. inexpensive soil? (4,5)
  2. 2. sight,hearing,smell,taste,touch and one extra for clairvoyance (5,5)
  3. 3. woman eating egg pie starts to cry (4)
  4. 5. angers and sounds like a noise (6)
  5. 7. in favour of healthy gain (6)
  6. 8. I'm in lit boundary (5)
  7. 14. present untangled snake (7)
  8. 15. affected when shifted (6)
  9. 19. swap former alteration (8)