Ain’t vice to wander doing nothing (8)
I believe the answer is:
inactive
'doing nothing' is the definition.
(I've seen this before)
'ain't vice to wander' is the wordplay.
'to wander' is an anagram indicator.
'aint'+'vice'='aintvice'
'aintvice' with letters rearranged gives 'INACTIVE'.
(Other definitions for inactive that I've seen before include "Not operative" , "sluggish" , "Dormant" , "Resting" , "Not moving/working" .)