Following urban road, a trail leads to camp (6)
I believe the answer is:
stalag
'camp' is the definition.
(German prison camp in World War 2)
'following urban road a trail' is the wordplay.
'following' says to put letters next to each other.
'urban road' becomes 'st' (I am not sure about the 'urban' bit.).
'trail' becomes 'lag' (both can mean to go behind).
'st' put next to 'a' is 'sta'.
'sta'+'lag'='STALAG'
'leads to' acts as a link.
Can you help me to learn more?
(Other definitions for stalag that I've seen before include "German prison camp in WW2" , "Water at the mouth" , "Type of German prison camp" , "WWII German prisoner of war camp" , "German World War two prison camp" .)