Barnyard beast (3)
(Other definitions for ram that I've seen before include "Computers need it to operate" , "Tup" , "Prepare to raid" , "The constellation Aries" , "Aggressive sheep?" .)
'barnyard beast' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for nanny goat that I've seen before include "Female farm animal" , "Billy's partner?" , "milk producer" , "Butter" .)