Snake renamed possibly (7)
I believe the answer is:
meander
'snake' is the definition.
(I know that snake is a more specific form of the action meander)
'renamed possibly' is the wordplay.
'possibly' is an anagram indicator.
'renamed' anagrammed gives 'MEANDER'.
(Other definitions for meander that I've seen before include "Red mane (anag) - roam aimlessly" , "Wind about or wander here and there" , "Wander without aim or direction" , "(Of river) wander" , "Dear men (anag) - wander" .)