Sauna cover (5)
I believe the answer is:
towel
'sauna cover' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for towel that I've seen before include "what sweater needs?" , "Owlet (anag)" , "Dryer" , "Piece of absorbent cloth or paper for drying" , "This could dry up" .)