Good parts possibly which the curate had? (3)
I believe the answer is:
egg
'good parts possibly which the curate had?' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'good parts possibly' is the wordplay.
'good' becomes 'g' (abbreviation).
'parts' is an insertion indicator (inserted letters separate or part others).
'possibly' becomes 'eg' (for example).
'g' going into 'eg' is 'EGG'.
Can you help me to learn more?
(Other definitions for egg that I've seen before include "Reproductive unit" , "Yolk and white in a shell" , "The advertising slogan exhorted us to go to work on one" , "Urge, ovum" , "Item with a yolk" .)