Being one point ahead, was the winner (3)
I believe the answer is:
won
'being one' is the definition.
Both the answer and definition are adjectives. Perhaps you can see a link between them that I can't see?
'point ahead was the winner' is the wordplay.
I cannot really see how this works, but
'point' could be 'w' (West) and 'w' is found within the answer.
'ahead' could be 'on' (synonyms) and 'on' is found in the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for won that I've seen before include "and 26: Chinese dumpling" , "Korean currency, was victorious" , "prevailed" , "Came first" , "Succeeded, conquered" .)