A win, not for the first time (5)

I believe the answer is:

again

'not for the first time' is the definition.
(another time)

'a win' is the wordplay.
'win' becomes 'gain' (synonyms).
'a'+'gain'='AGAIN'

(Other definitions for again that I've seen before include "Here we go ___" , "On the other hand" , "Next time" , "Anew" , "'Another time, once more (5)'" .)

I've seen this clue in The Globe and Mail and The Irish News.

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