Bird run over crossing motorway in city (9)
I believe the answer is:
nuremberg
'city' is the definition.
(Nuremberg is an example)
'bird run over crossing motorway' is the wordplay.
'bird' becomes 'grebe' (type of bird).
'over' says the letters should be written in reverse.
'crossing' indicates putting letters inside (to cross can mean to go over or around).
'motorway' becomes 'M' (as in motorway names - Mg, Mb etc).
'grebe'+'run'='greberun'
'greberun' reversed gives 'nureberg'.
'nureberg' enclosing 'm' is 'NUREMBERG'.
'in' is the link.
(Other definitions for nuremberg that I've seen before include "German city, famous for WW2 trials" , "Here war criminals tried" , "place of trials?" , "German town of trials fame" , "German city of Nazi war trials" .)