Injures man beside goals (5)
I believe the answer is:
maims
'injures' is the definition.
(maiming is a kind of injuring)
'man beside goals' is the wordplay.
'man' becomes 'm' (M is an abbreviation for male or masculine).
'beside' says to put letters next to each other (I've seen this in other clues).
'goals' becomes 'aims' (aim is a kind of goal).
'm'+'aims'='MAIMS'
(Other definitions for maims that I've seen before include "Makes defective" , "causes permanent hurt" , "Cripples" .)