Boulevard or avenue (4)
I believe the answer is:
road
I believe this clue is a double definition.
'boulevard' is the first definition.
(I've seen this in another clue)
'avenue' is the second definition.
(I've seen this in another clue)
(Other definitions for road that I've seen before include "Path" , "public highway" , "For place to anchor" , "course" , "Mine passage; way" .)