Good morning, the last few that are eluding me, thanks for some answers!
ACROSS:
21/12 Revered silence before sex that's amazing (4,4) : ?O?Y/S?I?
DOWN:
24 Where you'll find racy types like bed (5) : A?Y?P
25 It stands out quite transparently: Boris is extremely lacking, with negative, evil ends (5) :
O?T?K
Many thanks, NACW and bobbinwales, I think I've sorted it out now.
Just one confirmation for the following:
26 Like Brenda's one joke captured by sound device (8):
MAJESTIC ?