WHAT IS THE NOUN?

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Across
  1. 3. Smile
  2. 4. Reality
  3. 7. Million
  4. 8. Winner
  5. 10. Burger
  6. 11. Reason
  7. 13. Large marsupial
Down
  1. 1. Likes to chase mice
  2. 2. Has a trunk
  3. 4. Living
  4. 5. Latino
  5. 6. Prince
  6. 8. Flying mammal
  7. 9. Man's best friend
  8. 12. Ocean