Puts rumpled sheets away from mouth (8)
I believe the answer is:
upstream
'away from mouth' is the definition.
'puts rumpled sheets' is the wordplay.
'rumpled' indicates anagramming the letters.
'sheets' becomes 'ream' (I've seen this in other clues).
'puts' with letters rearranged gives 'upst'.
'upst'+'ream'='UPSTREAM'
(Other definitions for upstream that I've seen before include "Against a river current" , "Facing current" , "Eats rump (anag)" , "at an earlier stage in process" , "Current trend is not" .)