Moment to change direction to start to exploit game (4-4-3)
I believe the answer is:
tick-tack-toe
'game' is the definition.
(tick-tack-toe is a kind of game)
'moment to change direction to start to exploit' is the wordplay.
'moment' becomes 'tick' (both can mean a very short amount of time).
'to change direction' becomes 'tack' (I am not sure about this - if you are sure you should believe this answer much more).
'start to' says to take the initial letters.
The first letter of 'exploit' is 'e'.
'tick'+'tack'+'to'+'e'='TICK-TACK-TOE'
Can you help me to learn more?
(Another definition for tick-tack-toe that I've seen is " Noughts and crosses (US style)".)