Got a beast of an anagram! (4)
I believe the answer is:
goat
'beast of an anagram' is the definition.
The answer and definition can be both animals as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'got a' is the wordplay.
'got a' anagrams to 'GOAT'.
Though, I'm not sure how this is indicated.
Can you help me to learn more?
(Other definitions for goat that I've seen before include "Domesticated animal supplying milk, meat and wool" , "Capricorn animal" , "nanny, for example" , "foolish person" , "beast with sharp horns" .)