Cave mammal (3)
I believe the answer is:
bat
'cave mammal' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for bat that I've seen before include "Creature" , "Club used in cricket" , "Pipistrelle" , "Flutter (eyelids)" , "once wielded by 60 [GREIG]" .)