Eliminated creases (6)
I believe the answer is:
ironed
'eliminated creases' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ironed that I've seen before include "Smoothed out wrinkles" , "Got rid of creases" , "Smoothed cloth with flatbased implement" , "Removed creases" , "Decreased?" .)