Fold plate over (5)
I believe the answer is:
pleat
'fold' is the definition.
(pleating is a kind of folding)
'plate over' is the wordplay.
'over' indicates anagramming the letters.
'plate' with letters rearranged gives 'PLEAT'.
(Other definitions for pleat that I've seen before include "Gather" , "Double fold in a garment" , "that's tailor-made" , "Fold pressed or stitched into cloth" , "work on skirt?" .)