Ran sole organisation in city (7)
I believe the answer is:
orleans
'city' is the definition.
(I've seen this before)
'ran sole organisation' is the wordplay.
'organisation' is an anagram indicator.
'ran'+'sole'='ransole'
'ransole' anagrammed gives 'ORLEANS'.
'in' is the link.
(Other definitions for orleans that I've seen before include "French city on the Loire" , "Fabric" , "historic French city" , "It's New in Louisiana" , "French city saved by Joan of Arc" .)