Remove the wrinkles from (4)
I believe the answer is:
iron
'remove the wrinkles from' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for iron that I've seen before include "Remove creases from" , "great strength" , "Main component of steel" , "The metallic element plays a role in the transport of oxygen by the blood" , "Hard metal" .)