Won over for the present (3)
I believe the answer is:
now
'the present' is the definition.
(both can mean the current period)
'won over' is the wordplay.
'over' shows that the letters should be reversed in order.
'won' backwards is 'NOW'.
'for' is the link.
(Other definitions for now that I've seen before include "At this moment in time" , "The present moment" , "At present, this instant" , "Immediately" , "At the present time" .)