Hide a rodent (8)
I believe the answer is:
squirrel
I believe this is a double definition.
'hide' is the first definition.
(thesaurus)
'a rodent' is the second definition.
(squirrel is a kind of rodent)
(Other definitions for squirrel that I've seen before include "Arboreal creature" , "Nut hoarder" , "Red, grey, animal" , "Timmy Tiptoes, for example" , "Gnawing animal" .)