Unappealing church left without members (7)
I believe the answer is:
armless
'without members' is the definition.
(member can mean a limb)
'unappealing church left' is the wordplay.
I cannot really see how this works, but
'left' could be 'arm' (left arm) and 'arm' is found in the answer.
The remaining letters 'less' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for armless that I've seen before include "Short of members" , "to equip? Not so" .)