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