Large tavern in European capital (7)
I believe the answer is:
tallinn
'european capital' is the definition.
(capital of Estonia)
'large tavern' is the wordplay.
'large' becomes 'tall' (both can mean big).
'tavern' becomes 'inn' (I've seen this before).
'tall'+'inn'='TALLINN'
'in' acts as a link.
(Other definitions for tallinn that I've seen before include "Estonian city" , "Capital of Estonia" , "Capital on the Gulf of Finland" , "European capital" .)