Disfigure chap, breaking leg (6)
I believe the answer is:
mangle
'disfigure' is the definition.
(I know that mangle is a type of disfigure)
'chap breaking leg' is the wordplay.
'chap' becomes 'man' (chap can mean a man).
'breaking' indicates an anagram.
'leg' with letters rearranged gives 'gle'.
'man'+'gle'='MANGLE'
(Other definitions for mangle that I've seen before include "Mutilate, disfigure" , "Machine that uses rollers to press" , "Old-fashioned laundry appliance" , "Old device for wringing clothes" , "Mutilate - clothes wringer" .)