A churchwarden’s fantasy? (4,5)
I believe the answer is:
pipe dream
'a churchwarden's fantasy?' is the definition.
'pipe dream' can be an answer for 'fantasy?' (pipe dream is a kind of fantasy). I'm unsure of the 'a churchwarden's' bit.
'churchwarden's fantasy?' is the wordplay.
'churchwarden' becomes 'pipe' (I've seen this in other clues).
'fantasy?' becomes 'dream' (dream is a kind of fantasy).
'pipe'+'dream'='PIPE-DREAM'
Can you help me to learn more?
(Other definitions for pipe dream that I've seen before include "Fantasy" , "Futile hope" , "Sherlock's flight of fancy" , "castle in Spain?" , "Unrealistic aspiration" .)