Plated animal (9)
I believe the answer is:
armadillo
'plated animal' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for armadillo that I've seen before include "9ed [SHELLED] beast" , "Plated burrowing animal" , "Bony-plated insectivore" , "Animal covered with long plates" , "Mammal with protective plates" .)