Three points going to my opponent (5)
I believe the answer is:
enemy
'opponent' is the definition.
('enemy' can be a synonym of 'opponent')
'three points going to my' is the wordplay.
'three points' becomes 'ene' (I've seen this in other clues**).
'going to' means one lot of letters go next to another.
'ene'+'my'='ENEMY'
(Other definitions for enemy that I've seen before include "one in opposition" , "Time" , "Foe, adversary" , "Hostile person, foe" , "Armed adversary" .)