Young cow (4)
'young cow' is the definition.
(a calf is a young cow)
This is all the clue.
(Other definitions for calf that I've seen before include "Young of domestic cattle" , "Baby elephant or whale" , "Young bovine animal" , "Roo's mum (A. A. Milne)" , "stocking filler" .)
'young cow' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for heifer that I've seen before include "a little lower" , "Female bovine that has not given birth" , "Cow that has borne one or no calves" , "beast" , "part of stock" .)