Light fabric produced by commercial traveller in church (5)
I believe the answer is:
crepe
'light fabric' is the definition.
(I've seen this in another clue)
'commercial traveller in church' is the wordplay.
'commercial traveller' becomes 'rep' (a travelling sales representative).
'in' indicates putting letters inside.
'church' becomes 'CE' (abbreviation for Church of England).
'rep' put inside 'ce' is 'CREPE'.
'produced by' is the link.
(Other definitions for crepe that I've seen before include "Crinkled paper or fabric" , "Fabric with a wrinkled surface" , "Crinkly fabric and French pancake" , "Flat French food" , "Thin wrinkled fabric" .)