It may be sweet to eat or not (3)
I believe the answer is:
pea
'it may be sweet to eat or not' is the definition.
The definition suggests a singular noun which matches the answer.
'it' is the wordplay.
I cannot quite see how this works, but
'it' could be 'e' ('e' can mean 'electronic' which is similar to 'IT') and 'e' is found in the answer.
The remaining letters 'pa' 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 pea that I've seen before include "It grows in 23 Down" , "It may climb frame" , "Leguminous vegetable" , "It grows in a pod" , "Common vegetable seed from pod" .)