Run from the police, northbound (4)
I believe the answer is:
lope
'run' is the definition.
(lope is a kind of run)
'from the police northbound' is the wordplay.
'from' indicates a hidden word.
'northbound' says the letters should be written in reverse.
'epol' is hidden within 'the police'.
'epol' backwards is 'LOPE'.
(Other definitions for lope that I've seen before include "Stride along" , "Bound along carrying pole" , "Run bearing pole" , "Walk with long strides" , "Canter" .)