The tale of custard the dragon

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Across
  1. 2. an outlet for smoke
  2. 3. pointed prickles
  3. 5. a prison
  4. 7. a fruit ; a furious mythical creature
  5. 9. not kind
  6. 11. moving round in circles
Down
  1. 1. a sea robber
  2. 2. a sweet dish ; a fruit
  3. 4. to make growling sounds from nose
  4. 6. not brave
  5. 8. a yellow flower having small round seeds
  6. 10. a synonym of big knife