1. Unit of electrical current (6)
4. Plotters (8)
10. Lawyer (9)
11. Fatigued (5)
12. Tall woody plants (5)
13. Certain flightless birds (9)
14. Not inside (7)
16. Illustrate (4)
19. Gemstone (4)
21. Forestall (7)
24. Survival (9)
25. A flat-bottomed boat (5)
26. Belief (5)
27. With no possible medical treatment (9)
28. Less than expected (8)
29. Sell again (6)
Down
1. Strong drive for success (8)
2. Optimizes (8)
3. Remains of a destroyed building (5)
5. An artery in the neck (7)
6. Disentangle (9)
7. Crude (6)
8. Pleasure from causing pain (6)
9. Endeavored (6)
15. Crucial (9)
17. Endurable (8)
18. Intangible (8)
20. Safe return of a plane (7)
21. Stab (6)
22. Elevated open grasslands (6)
23. Slowly (musical term) (6)
25. Enduring (5)