Toothless mammal (8)
I believe the answer is:
edentate
'toothless mammal' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for edentate that I've seen before include "Toothless mammal" , "Toothless creature" , "Mammal with few or no teeth" , "Sloth, perhaps" , "teeth? None" .)