Bulldoze each road in urban area (4,4)
I believe the answer is:
tear down
'bulldoze' is the definition.
(thesaurus)
'each road in urban area' is the wordplay.
'each' becomes 'ea'.
'road' becomes 'rd' (abbreviation).
'in' indicates putting letters inside.
'urban area' becomes 'town' (town is a kind of urban area**).
'ea'+'rd'='eard'
'eard' put into 'town' is 'TEAR DOWN'.
(Other definitions for tear down that I've seen before include "Level" , "trash" , "Demolish" .)