Young cow or elephant (4)
I believe the answer is:
calf
I believe this is a double definition.
'young cow' is the first definition.
(a calf is a young cow)
'elephant' is the second definition.
(I have seen 'Young elephant' mean 'calf' so perhaps 'elephant' could also mean 'calf')
(Other definitions for calf that I've seen before include "binding?" , "Young moo-er" , "Young animal - part of leg" , "Young of domestic cattle" , "Young bovine animal" .)