Closure of bank that is opposed to capital (4)
I believe the answer is:
kiev
'to capital' is the definition.
(capital of Ukraine)
'closure of bank that is opposed' is the wordplay.
'closure of' suggests the final letters.
'that is' becomes 'ie' (short for Latin 'id est', 'that is').
'opposed' becomes 'v' (abbreviation for versus).
The last letter of 'bank' is 'k'.
'k'+'ie'+'v'='KIEV'
(Other definitions for kiev that I've seen before include "Capital city of the Ukraine" , "Ukraine's capital - way of cooking chicken" , "Ukrainian capital" , "Ukrainian city" , "FC Dynamo/chicken ___" .)