Injures (5)
I think it could be either:
'injures' is the definition.
(harming is a kind of injuring)
This is the entire clue.
(Other definitions for harms that I've seen before include "Injures, damages" , "Hurts, damages" , "Wounds" .)
'injures' is the definition.
(maiming is a kind of injuring)
This is all the clue.
(Other definitions for maims that I've seen before include "causes permanent hurt" , "Makes defective" , "Cripples" .)