6. An ancient Greek philosopher (7)
7. Rule (5)
9. Clue (4)
10. Mallee (10)
11. Reciprocals (8)
13. Incongruous (6)
15. Aquatic plant (4)
17. An object (5)
18. Reflected sound (4)
19. Voice box (6)
20. Overt (8)
23. Portion (10)
26. Close (4)
27. A firm open-weave fabric (5)
28. Clear up (7)
Down
1. Pharmacist (10)
2. Penny pinchers (6)
3. Ear-related (4)
4. Boring (8)
5. Speech disorder (4)
6. Descendant (5)
8. Feed (7)
12. Pig (5)
14. In a dutifully compliant manner (10)
16. Low leather step-in shoes (7)
17. Categorization (8)
21. Give delight to (6)
22. Picture (5)
24. Brusque (4)
25. Askew (4)