Hurt badly (4)
I believe the answer is:
maim
'hurt badly' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for maim that I've seen before include "Hurt badly" , "Injure or harm severely" , "Injure seriously, leaving permanent damage" , "Wound and cripple" , "Injure (a person), causing permanent disability" .)