Walker who uses a vehicle on the quiet (5)
I believe the answer is:
tramp
'walker who' is the definition.
'tramp' can be an answer for 'walker' (street walker). I am not sure about the rest of the definition.
'a vehicle on the quiet' is the wordplay.
'a vehicle' becomes 'tram' (tram is a kind of vehicle).
'on' says to put letters next to each other.
'the quiet' becomes 'p' (music symbol for 'piano', ie soft or quiet).
'tram'+'p'='TRAMP'
'uses' is the link.
Can you help me to learn more?
(Other definitions for tramp that I've seen before include "A boat; a vagrant" , "Walk heavily and firmly" , "one unlikely ever to have a mortgage!" , "Take a walk" , "Attack with knife" .)