Oscar's crossword using the "or" sound

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Across
  1. 3. A person who writes a book
  2. 4. In a family, a child that is not a son
  3. 6. You use this to write on a blackboard
  4. 7. Somewhere that you store and hang your clothes in your bedroom
  5. 10. The number after three when counting in mathematics
Down
  1. 1. At Knox this is compulsory to play on a Saturday
  2. 2. The name of the group of people who watch a theatre show
  3. 5. You wash your clothes in a washing maching in this room in the house
  4. 8. The sound a lion makes
  5. 9. There are sixteen on a pool table