Across:
3. essa
4. carpet
5. ltd
6. die
7. mug
8. six
9. slice
10. fake
13. evil

Down:
1. meatless
2. grarrg
6. duck
7. meri
11. art
12. eel

http://www.neopets.com/games/crossword/index.phtml

If you spot any mistakes, please PM a staffer who is online.