Dash with leader going down passage (4)

I believe the answer is:
lane
'passage' is the definition.
(I've seen this in another clue)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for lane that I've seen before include "Quiet road" , "Single line of traffic" , "Narrow track or path" , "Passage" , "Minor road" .)
