Go, dissipated varlet! (6)
I believe the answer is:
travel
'go' is the definition.
('travel' can be a synonym of 'go')
'dissipated varlet' is the wordplay.
'dissipated' indicates anagramming the letters.
'varlet' with letters rearranged gives 'TRAVEL'.
(Other definitions for travel that I've seen before include "Tourism" , "Pass" , "tour" , "Varlet (anag.)" , "Go on a journey" .)