Hired gun running amok round British city (9)
I believe the answer is:
edinburgh
'city' is the definition.
(Edinburgh is an example)
'hired gun running amok round british' is the wordplay.
'running amok' is an anagram indicator.
'round' indicates putting letters inside.
'british' becomes 'b' (abbreviation e.g. in 'BBC').
'hired'+'gun'='hiredgun'
'hiredgun' anagrammed gives 'edinurgh'.
'edinurgh' placed around 'b' is 'EDINBURGH'.
(Other definitions for edinburgh that I've seen before include "fringe city" , "Auld Reekie" , "Scottish arts festival city" , "Scotland's capital" , "Lothian city" .)