City left in danger after disturbance (9)
I believe the answer is:
leningrad
'city' is the definition.
(Leningrad is an example)
'left in danger after disturbance' is the wordplay.
'left' becomes 'l' (common abbreviation**).
'after' means one lot of letters go next to another.
'disturbance' is an anagram indicator.
'in'+'danger'='indanger'
'indanger' with letters rearranged gives 'eningrad'.
'l'+'eningrad'='LENINGRAD'
(Other definitions for leningrad that I've seen before include "Soviet city now St Petersburg" , "old city" , "Former name of city" , "St Petersburg, 1924-91" , "St Petersburg formerly" .)