City strike not ending quickly (7)
I believe the answer is:
belfast
'city' is the definition.
(Belfast is an example)
'strike not ending quickly' is the wordplay.
'strike' becomes 'belt'.
'not ending' means to remove the last letter.
'quickly' becomes 'fast' (synonyms).
'belt' with its final letter taken off is 'bel'.
'bel'+'fast'='BELFAST'
(Other definitions for belfast that I've seen before include "City on the Lagan" , "Northern Ireland home to Queen's University" , "Northern Ireland city" , "N. Ireland city" , "Capital of Northern Ireland" .)