Hi Nicola,
5 word for prison officers minus first letter, follows single letter
21 think of ‘finally’ as you might ‘primarily’
23 think biblically. Usual two letters for trendy
Sorry but I thought this was poor. As well as being pretty much a write-in, some of the cluing wasn't very good. In addition to the examples above, why does the solution to 21d meet the definition? In 20a, why is the second part a provision for baking? No indication of a homophone. Maybe I just got out the wrong side of bed this morning?