All answers have 2 words starting with same Letter.
5. Own up/Confess
6. Very hot during July and August
8. Without ties or commitments
9. Lacking mercy
11. Dainty trinket or ornament
12. Cowardly
14. Exactly the right tone
15. The dregs of society
16. To dither and be undecided
20. Upset, great disorder and confusion