A part of the journey without drunk (7)
I believe the answer is:
legless
'drunk' is the definition.
(I've seen this before)
'a part of the journey without' is the wordplay.
'a part of the journey' becomes 'leg' ('leg' is part of 'journey').
'without' becomes 'less' (I've seen this in another clue).
'leg'+'less'='LEGLESS'
(Other definitions for legless that I've seen before include "Worms are" , "like a fish?" , "Slangily drunk, lacking lower limbs" , "Drunk - dismembered?" , "Tight" .)