Wrinkle remover (4)
I believe the answer is:
iron
'wrinkle remover' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for iron that I've seen before include "Ferrous metal" , "sort of club" , "Heavy metallic element" , "Wellington was known as the .... Duke" , "Metal obtained from haematite" .)