The special person

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Across
  1. 2. This feature of a castle is really important
  2. 5. Dr McCavish has one, why don't I?
  3. 7. My natural facial expression is what?
  4. 9. My all time fav part of physics, converging or diverging?
Down
  1. 1. I am number what?
  2. 2. The best university in the world
  3. 3. I go for the ---- hairstyle
  4. 4. People that wear these are unhealthy
  5. 6. I have big what?
  6. 8. I have a teaching degree but can't do this...
  7. 10. I can never look you in the...