Loiter listlessly (5)
I believe the answer is:
mooch
'loiter listlessly' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for mooch that I've seen before include "Loiter without enthusiasm" , "Loiter in bored fashion" , "Hang around aimlessly" , "Skulk" , "Wander aimlessly" .)