Got a new creature (4)
I believe the answer is:
goat
'creature' is the definition.
'got a new' is the wordplay.
'new' is an anagram indicator.
'got'+'a'='gota'
'gota' with letters rearranged gives 'GOAT'.
(Other definitions for goat that I've seen before include "lecher" , "Beast (of Capricorn)" , "Domesticated animal supplying milk, meat and wool" , "Billy - nanny" , "beast with sharp horns" .)