English name used in vain around capital (6)
I believe the answer is:
vienna
'capital' is the definition.
(capital of Austria)
'english name used in vain around' is the wordplay.
'english' becomes 'E' (abbreviation).
'name' becomes 'n' (common abbreviation e.g. on forms).
'used in' means one lot of letters goes inside another.
'around' is an anagram indicator.
'e'+'n'='en'
'vain' is an anagram of 'vina'.
'en' put within 'vina' is 'VIENNA'.
(Other definitions for vienna that I've seen before include "somewhere in Austria" , "City of Strauss and the waltz" , "European capital" , "European city for New Year's Day concert" , "Strauss 'Tales from the . . . . . . Woods'" .)