Crimp baffling plate (5)
I believe the answer is:
pleat
'crimp' is the definition.
(I know that pleat is a type of crimp)
'baffling plate' is the wordplay.
'baffling' is an anagram indicator.
'plate' anagrammed gives 'PLEAT'.
(Other definitions for pleat that I've seen before include "Fold pressed or stitched into cloth" , "Flat fold of cloth" , "Double fold in a garment" , "Leapt (anag)" , "Type of fold in fabric" .)