A: winner; B: in a draw; ___ ? Not so far! (6)
I believe the answer is:
closer
'not so far' is the definition.
('close' can be the opposite of 'far' so perhaps 'closer' is reasonable for 'not so far')
'a winner b in a draw ?' is the wordplay.
I cannot really see how this works, but
'draw ?' could be 'close' (drawing is a kind of closing) and 'close' is found in the answer.
A single letter 'r' remains which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
(Other definitions for closer that I've seen before include "Nearer or meaner" , "One winds up" , "more precise" , "Cresol (anag.)" , "Not so far off" .)