Foreign noisy tavern (4)

I believe the answer is:

finn

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'foreign noisy tavern' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.

'noisy tavern' is the wordplay.
'noisy' becomes 'f'.
'tavern' becomes 'inn' (I've seen this before).
'f'+'inn'='FINN'

Can you help me to learn more?

(Other definitions for finn that I've seen before include "hero of English or American novel" , "Someone from Helsinki?" , "hero of American fiction" , "eg Sibelius" , "Nordic" .)

I've seen this clue in the Evening Standard.

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