Across

2. Aries sign

5. Run away from

6. Engrave with acid

7. National Basketball Assoc.

8. Past of spit

10. Not wild

13. Used in knitting

16. Crust on healing wound

18. A tree

19. Throbbing pain

20. Just

21. Canine

Down

1. Flutter

2. Pay to borrow

3. Pork or beef

4. Scheme to trick

8. Like a fox

9. What we breathe

11. Part of a circle

12. Receding tide

14. Curved structure

15. Must have

16. Smoke and fog

17. Capable