Swine has large following in capital (7)
I believe the answer is:
belfast
'capital' is the definition.
(Belfast is an example)
'swine has large following' is the wordplay.
'swine' becomes 'beast'.
'has' is an insertion indicator.
'large' becomes 'l'.
'following' becomes 'f' (used when citing page numbers etc).
'l'+'f'='lf'
'beast' enclosing 'lf' is 'BELFAST'.
'in' is the link.
(Other definitions for belfast that I've seen before include "N. Ireland city" , "Northern Ireland city" , "Capital of Northern Ireland" , "City on the Lagan" , "NI city" .)