Hobo (5)
I believe the answer is:
tramp
'hobo' is the definition.
(I know that hobo can be written as tramp)
This is the entire clue.
(Other definitions for tramp that I've seen before include "Trudge; vagrant" , "Walk heavily, as when weary, or through mud" , "Lady or gentleman of the road or roving ship" , "Footslog" , "one unlikely ever to have a mortgage!" .)