Well, one clue left (Re-explain not having sex to end quivering nether regions, 8) so I decided to try to place the answers. It all seemed to be working until I got left with top right corner and no answers that will fit.
thank you Kirky. I did try that anagram but couldn't parse it. I have top of 4d, top of 5d, 6d' end of 20a but see too that top of 2d diesn't work. I have royally messed up somewhere!