Playing to win

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Across
  1. 3. All blacks play this
  2. 5. 15 in rugby-position
  3. 9. a boy in family
  4. 10. most kids catch a ride to school on this
  5. 11. a girl in family
  6. 13. punishment for being naughty
  7. 16. these mark the corners of the field
  8. 17. Naughty school kid
  9. 18. a colour, *tomato*
Down
  1. 1. a car with symbol of 'Seagull wings"
  2. 2. a string instrument
  3. 4. a sandy place
  4. 6. an instrument played by pressing keys
  5. 7. 1 in rugby-position
  6. 8. soft surface rugby is played on
  7. 10. A group of musicians
  8. 11. a place to learn
  9. 12. these are kicked at for 2 or 3 points
  10. 14. worth 5 points
  11. 15. a strong word for dislike