Stray; wandering (6)
I believe the answer is:
errant
I believe this clue is a double definition.
'stray' is the first definition.
(I've seen this in another clue)
'wandering' is the second definition.
(I've seen this in another clue)
(Other definitions for errant that I've seen before include "Like many a knight" , "Sinful" , "like Don Quixote?" , "Off the mark, wandering" , "Wrong" .)