Got a new kid (4)
I believe the answer is:
goat
'kid' is the definition.
(thesaurus)
'got a new' is the wordplay.
'new' indicates anagramming the letters.
'got'+'a'='gota'
'gota' with letters rearranged gives 'GOAT'.
(Other definitions for goat that I've seen before include "Capricorn animal" , "lecherous sort" , "Butting nanny, perhaps?" , "foolish person" , "Horned beast" .)