Eared seal (3,4)
I believe the answer is:
sea lion
'eared seal' is the definition.
(sea lion is a kind of eared seal)
This is the entire clue.
(Other definitions for sea lion that I've seen before include "Marine animal, used as a circus performer" , "Marine beast, the male having a mane" , "one often immersed in salty water" , "Creature" , "Large seal" .)