Achieve success in port wine making technique (7)

I believe the answer is:

ripasso

'wine making technique' is the definition.
(ripasso is a method of making wine)

'achieve success in port' is the wordplay.
'achieve success' becomes 'pass' (eg pass an exam).
'in' indicates putting letters inside.
'port' becomes 'rio' (Rio de Janeiro is a port).
'pass' placed within 'rio' is 'RIPASSO'.

I've seen this clue in The Guardian.

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