Severely mutilate (6)
I believe the answer is:
mangle
'severely mutilate' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for mangle that I've seen before include "rolling-press" , "Clothes-wringer for leg-man" , "Mutilate badly; wringer" , "Severely mutilate" , "Tear up" .)