1. Helps (7)
5. Hussy (7)
9. In some cases, an avenger (9)
10. Paraguayan tea (5)
11. Not artificial (7)
12. Starchy food (7)
13. Primary (9)
15. Nab (5)
17. Public transit vehicles (5)
19. Longing for something past (9)
22. Maintain (7)
25. Lethargy (7)
26. Language of Persia (5)
27. A statement that is necessarily true (9)
28. Connection (7)
29. Tallest mountain (7)
Down
1. Move forward (7)
2. Blind (9)
3. Indulgence (7)
4. A single object (9)
5. Robbery (5)
6. Of the region of Olympia (7)
7. Slow (5)
8. Egyptian king (7)
14. Lethargy (9)
16. An acrobat's high wire (9)
17. Self-consciously timid (7)
18. Enduring strength (7)
20. Impressive (7)
21. Colloquially: a "shrink" (7)
23. Femme fatale (5)
24. French for "Our" (5)