One rumble going round city (9)
I believe the answer is:
melbourne
'city' is the definition.
(Australian city)
'one rumble going round' is the wordplay.
'going round' indicates an anagram.
'one'+'rumble'='onerumble'
'onerumble' with letters rearranged gives 'MELBOURNE'.
(Other definitions for melbourne that I've seen before include "State capital of Victoria" , "First capital of Australia (1901-27)" , "PM 1834, 35-41" , "Prime minister to William IV - setting for many an 6 test" , "home for Victorians" .)