Wander away (5)
I believe the answer is:
stray
'wander away' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for stray that I've seen before include "out of place" , "Depart from the right path" , "Wander; be unfaithful" , "Appearing occasionally" , "Drift - isolated" .)