What the????????

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Across
  1. 3. fast food chain
  2. 4. something difficult to solve
  3. 6. something that is hot
  4. 8. Something Italians like to eat
  5. 9. a martial arts activity
  6. 12. Luxury car
  7. 14. Likes to chase mice
  8. 15. capital of Australia
  9. 16. a very big reptile
  10. 17. Man's best friend
Down
  1. 1. what we eat
  2. 2. a Marvel comic character
  3. 5. Has a trunk
  4. 7. Flying mammal
  5. 10. An American actor, mainly plays gangsters
  6. 11. Australian animal
  7. 13. Social Media