'l' words

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Across
  1. 2. what 'l' is in or from the nearby area (5)
  2. 4. what 'v' is another name for a ship (6)
  3. 6. what 'c' forms part of the percussion section of an orchestra? (6)
  4. 10. what 'o' - do it if you want, not compulsory (8)
  5. 14. what 'e' is a triangle with matching sides and angles? (11)
  6. 16. what 'p' is a child at school (5)
  7. 17. what 'c' counted as two together, often people in a relationship (6)
  8. 18. what 'l' is all wonky, not straight at all (8)
  9. 20. what 't' are often removed from the back of the throat? (7)
Down
  1. 1. what 'n' is usual, not out of the ordinary (6)
  2. 3. what 'f' the remains of creatures buried in the earth or sea bed from millions of years ago (7)
  3. 5. what 'v' the name given to someone who wilfully destroys property (6)
  4. 7. what 'm' is the first seven digit number (7)
  5. 8. what 'h' is where you go for medical treatment?(8)
  6. 9. what 't' adorns your tree at Christmas (6)
  7. 11. what 's' tap out the beats in a word? (8)
  8. 12. what 'l' a sound - giggling when its funny (8)
  9. 13. what 't' is peaceful, restful, without disturbance? (8)
  10. 15. what 't' is three times the value (6)
  11. 19. what 's' is not deep? (7)