8a accountant with vigour granted convertible [9]???r?????
16a nail detective/poet [7] ?p?n?e?
20a with many sounds, hear girl add chopin composition [10] ?o???h???c
23a at home, novelists hidden impropriety [9]?o???h???c
5d spoils play [4]
24d Frenchman is ok when victory's held [5[ ?n?v?
No-one has answered 23a yet. I can't get it either. The question author has given the known letters for 20a not 23a. (Clue is At home, novelist's hidden impropriety (9).) The lettersI have are ?N?E???U?