One occupying seat in European capital (5)

I believe the answer is:

sofia

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This might be a double definition.

'one occupying seat' is the first definition.
'Sofia' can be an answer for 'seat' (Sofia is an example). I'm unsure of the 'one occupying' bit.

'european capital' is the second definition.
(capital of Bulgaria)

'in' acts as a link.

Can you help me to learn more?

(Other definitions for sofia that I've seen before include "capital city" , "Bulgarian city" , "Foreign city" , "capital place" , "Balkan capital" .)

I've seen this clue in The Times.

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