The digraph /ow/ making the 'ou' sound in cow.

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Across
  1. 3. A funny person at a circus(5)
  2. 4. A special hat the queen wears(5)
  3. 6. A really tall building(5)
  4. 8. A noise animals make when they are angry(5)
  5. 11. To give a different opinion(7)
  6. 13. Immediately(3)
  7. 16. Lions hunting(5)
  8. 17. Getting wet to clean yourself(6)
Down
  1. 1. A place where people live(4)
  2. 2. Opposite of up(4)
  3. 3. Too many people in one place(7)
  4. 5. A fine dust (6)
  5. 7. Beautiful plants(6)
  6. 9. A farm animal that gives us milk (3)
  7. 10. Colour of most sticks(5)
  8. 12. A question opener(3)
  9. 14. A bird that is awake at night(3)
  10. 15. Lots of people(5)