Tramp needs time with Barnaby (6)
I believe the answer is:
trudge
'tramp' is the definition.
(trudge is a kind of tramp)
'time with barnaby' is the wordplay.
'time' becomes 't'.
'with' says to put letters next to each other.
'barnaby' becomes 'rudge' (barnaby rudge is a dickens novel).
't'+'rudge'='TRUDGE'
'needs' is the link.
(Other definitions for trudge that I've seen before include "Clump" , "Walk heavily, as if through mud" , "Plod doggedly" , "Walk slowly and heavily" , "Traipse" .)