Wood works in church (5)
I believe the answer is:
copse
'wood' is the definition.
(I've seen this before)
'works in church' is the wordplay.
'works' becomes 'ops' (I've seen this in other clues).
'in' means one lot of letters goes inside another.
'church' becomes 'ce' (abbreviation for Church of England).
'ops' going inside 'ce' is 'COPSE'.
(Other definitions for copse that I've seen before include "spinney" , "Dense growth of bushes or trees" , "Small group of trees" , "Wood - thicket" , "Cluster of trees" .)