One might fix a guy's target in game, over time (4,3)
I believe the answer is:
tent pin
'one might fix a guy's target' is the definition.
I don't know anything about this answer so I cannot judge whether this works.
'game over time' is the wordplay.
'game' becomes 'tenpin' (I can't explain this - if you can you should give a lot more credence to this answer).
'over' means one lot of letters goes inside another.
'time' becomes 't' (abbreviation).
'tenpin' enclosing 't' is 'TENT-PIN'.
'in' acts as a link.
Can you help me to learn more?
(Another definition for tent pin that I've seen is " Camping equipment".)