Church is after pound coins (5)
I believe the answer is:
pence
'coins' is the definition.
(penny is a kind of coin)
'church is after pound' is the wordplay.
'church' becomes 'CE' (abbreviation for Church of England).
'is after' says to put letters next to each other.
'pound' becomes 'pen' (I've seen this in another clue).
'ce' after 'pen' is 'PENCE'.
(Other definitions for pence that I've seen before include "some European capital" , "President's vice" , "Lowest denomination of British currency" , "Copper coins" , "p" .)