I have 20a as ENTRENCH but cannot fit it with anything else!
17d.Friend in choir vexed with increasing number of syllables?(8) R?E????
22d.Murderer admitting parent is a beast(6) thought it might be cougar
15d.Fashionably tailored,he's concered with his image(8) Could be Idolises/Iconises?
11a.Not all of the litter was attributable to the church(5-3) T?T?? ???
Any help gratefully received!