London's finance? (7)

I believe the answer is:

capital

I believe this clue is a double definition.

'london's' is the first definition.
(I've seen this before)

'finance?' is the second definition.
(thesaurus)

(Other definitions for capital that I've seen before include "Metropolis" , "Finance - excellent!" , "It's terrific in the big city" , "Upper case city" , "City - finance - very good" .)

I've seen this clue in the Evening Standard.

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