Vagrant fellow in the city (7)
I believe the answer is:
hoboken
'the city' is the definition.
I don't know anything about this answer so I can't tell whether this works.
'vagrant fellow' is the wordplay.
'vagrant' becomes 'hobo' (I've seen this in another clue).
'fellow' becomes 'ken' (I can't justify this - if you can you should give a lot more credence to this answer).
'hobo'+'ken'='HOBOKEN'
'in' is the link.
Can you help me to learn more?
(Other definitions for hoboken that I've seen before include "City in New Jersey (or part of Antwerp)" , "Sinatra's NJ birthplace" .)