Stuck on:
1a State is holding radio prankster over cutting things (8) ends in S
11a Our feature of features doubled (10) ends -K?S
17a Dave's top "expert", arse-over-tip politician with singular flies (7) 4th prob. A, 6th def. P
2d Round figure accepted by stupid prat in key part of a big company (9) 3rd R, 7th a
3d /22a Balls' protector,mass of hair on top, who's out to wind up listeners (5,4) ??O?? ?O?K
4d Extension where beer belly hangs out (7) ??E???P
Many thanks in advance