Worker going to church for wood (5)
I believe the answer is:
beech
'for wood' is the definition.
(beech is a kind of wood)
'worker going to church' is the wordplay.
'worker' becomes 'bee' (a worker bee).
'going to' means one lot of letters go next to another.
'church' becomes 'ch' (common abbreviation).
'bee'+'ch'='BEECH'
(Other definitions for beech that I've seen before include "Tree (with green or copper leaves)" , "It has branches" , "Timber tree" , "Wood" , "Common forest tree" .)