Expert, connoisseur (5)

I believe the answer is:

maven

I believe this is a double definition.

'expert' is the first definition.
(I know that maven is a type of expert)

'connoisseur' is the second definition.
(I've seen this in another clue)

(Other definitions for maven that I've seen before include "Expert, connoisseur (US)" , "US authority" .)

I've seen this clue in the Sydney Morning Herald.

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