Church aisle not a winding shape (6)
I believe the answer is:
chisel
'shape' is the definition.
(thesaurus)
'church aisle not a winding' is the wordplay.
'church' becomes 'ch' (common abbreviation).
'not' indicates named letters should be taken away.
'winding' indicates anagramming the letters.
'aisle' with 'a' taken out is 'isle'.
'isle' with letters rearranged gives 'isel'.
'ch'+'isel'='CHISEL'
(Other definitions for chisel that I've seen before include "Flat steel tool with a cutting edge" , "Tool for shaping wood or metal" , "Sculptor's tool" , "It can be cold in the workshop" , "Edge tool for the carpenter" .)