Young of the coypu, perhaps (3)
I believe the answer is:
pup
'young' is the definition.
(pup is a kind of young)
'of the coypu perhaps' is the wordplay.
'of' says the answer is hidden in the clue.
'PUP' is hidden within 'coypu perhaps'.
(Other definitions for pup that I've seen before include "Young of canines" , "Whelp" , "Young dog as palindrome" , "Small palindromic dog" , "Produce litter" .)