Crossword Genius

Success in winemaking (3)

Ross

I believe the answer is:

win

I'm a little stuck... Click here to teach me more about this clue!

'success' is the definition.
(I know that win is a type of triumph)

'in winemaking' is the wordplay.
I cannot quite understand how this works, but
'in' is present in the answer.
A single letter 'w' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for win that I've seen before include "Be victorious or succeed" , "Finish in first place" , "Gain; triumph" , "Come out on top" , "Trumph" .)

I've seen this clue in the Evening Standard.
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