ox24

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Across
  1. 4. 10^-18
  2. 8. Austrian airport
  3. 9. Gill relative's partner
  4. 11. president (F)
  5. 12. christmas movie
Down
  1. 1. subatomic
  2. 2. composer
  3. 3. makes hormones
  4. 5. cousin
  5. 6. 1 millionth
  6. 7. cleaning organ
  7. 10. cake (A)