Naked animal we hear (4)
I believe the answer is:
bare
'naked' is the definition.
(without clothing)
'animal we hear' is the wordplay.
'animal' becomes 'bear' (bear is a kind of animal).
'we hear' indicates a 'sounds like' (homophone) clue.
'bear' is a homophone of 'BARE'.
(Other definitions for bare that I've seen before include "Stark - naked" , "Not clothed" , "Unadorned - naked" , "Naked or empty" , "Unclothed or unadorned" .)