De-wrinkled (6)
I believe the answer is:
ironed
'de-wrinkled' 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 "prepared for 23 [WARDROBE] ?" , "Had an evening out" , "Made smooth, shirt or collar" , "Got rid of creases" , "Smoothed out wrinkles" .)