Animal pound (5)
I believe the answer is:
squid
I believe this is a double definition.
'animal' is the first definition.
(squid is a kind of animal)
'pound' is the second definition.
(slang term for pounds sterling)
(Other definitions for squid that I've seen before include "Ten-armed mollusc" , "Item of seafood" , "Cephalopod mollusc" , "Eight-armed mollusc" , "Large cephalopod" .)