De-creases (5)
I believe the answer is:
irons
'de-creases' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for irons that I've seen before include "British actor" , "Smooths, presses" , "for old convict to wear" , "Golfclubs with metal hands" , "Prepares clothes" .)