Feature of, perhaps, each church (4)
I believe the answer is:
apse
'church' is the definition.
(I've seen this before)
'feature of perhaps each' is the wordplay.
'feature of' indicates the answer is hidden within the clue.
'APSE' is hidden in the letters of 'perhaps each'.
(Other definitions for apse that I've seen before include "Semicircular recess in church" , "Niche in church" , "Offshoot from the choir, nave or aisle in a church" , "Domed section of a church" , "space for altar" .)