Wander unwisely and get cautioned (6)
I believe the answer is:
warned
'cautioned' is the definition.
(I've seen this in another clue)
'wander unwisely' is the wordplay.
'unwisely' indicates anagramming the letters.
'wander' anagrammed gives 'WARNED'.
'and get' acts as a link.
(Other definitions for warned that I've seen before include "Cautioned about Andrew" , "Put on the alert" , "Notified of potential danger" , "Notified in advance" .)