An inedible cake? (4)
I believe the answer is:
soap
'an inedible cake?' is the definition.
(I've seen this in another clue)
'an inedible' is the wordplay.
I cannot quite see how this works, but
'an' could be 'a' and 'a' is present in the answer.
The remaining letters 'sop' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for soap that I've seen before include ". . . . opera, sentimentalised radio or tv series" , "Bathroom item" , "Cleansing bar" , "It has detergent properties" , "bar in Bath?" .)