Across:

3. Deltas

5. Erodes

7. Ayes

8. Elope

9. Pasadena

10. Tipsy

12. Radar

15. Tarantula

16. Spare

17. Gases

19. Allergic

20. Target

Down:

1. Slackers

2. Cleopatra

4. Alpha

6. Ration

11. Solitaire

13. Addresses

14. Mascot

18. Reign