Church lies about implement (6)
I believe the answer is:
chisel
'implement' is the definition.
(chisel is a kind of implement)
'church lies about' is the wordplay.
'church' becomes 'ch' (common abbreviation).
'about' indicates anagramming the letters.
'lies' anagrammed gives 'isel'.
'ch'+'isel'='CHISEL'
(Other definitions for chisel that I've seen before include "Wood-shaping tool" , "Sculptor's tool" , "Carpenter's or mason's tool" , "Slangily cheat with wood-working tool" , "Carpentry tool" .)