Fold the plate over (5)
I believe the answer is:
pleat
'fold' is the definition.
(pleating is a kind of folding)
'the plate over' is the wordplay.
'over' indicates anagramming the letters.
'plate' is an anagram of 'PLEAT'.
(Other definitions for pleat that I've seen before include "work on skirt?" , "Fold formed in fabric" , "Gather" , "Crease" , "Fold in clothing" .)