Salon treatment, for short (4)
I believe the answer is:
perm
'salon treatment for short' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for perm that I've seen before include "A hairdo; Urals city" , "Old-fashioned haircut" , "Russian city and hairstyle, in short" , "Give a wave" , "To curl (hair)" .)