Across

    1. Melody

    3. Reverse an ailment

    6. Trail

    9. Survey

    11. What we breathe

    12. When you bang your toe

    13. Shrek, for example

    14. Said at a wedding (2 wds)

    15. Worry

    17. At the ends of legs

    20. Large rodents

    21. Low fat milk

    Down

    1. Paid to a waiter

    2. Mesh pouch

    4. Card game

    5. English as a Second Language

    7. Not before

    8. Engrained action

    9. Evidence

    10. Very big

    15. Long distance away

    16. Eastern Standard Time

    18. Large deer

    19. Short for Timothy