Fabric salesman in church (5)
I believe the answer is:
crepe
'fabric' is the definition.
(crepe is a kind of fabric)
'salesman in church' is the wordplay.
'salesman' becomes 'rep' (I've seen this before).
'in' means one lot of letters goes inside another.
'church' becomes 'ce' (abbreviation for Church of England).
'rep' put inside 'ce' is 'CREPE'.
(Other definitions for crepe that I've seen before include "Thin wrinkled fabric" , "Crinkled paper or fabric" , "sole?" , "Crinkly fabric and French pancake" , "Pancake - type of paper" .)