Bearded beasts (4)
I believe the answer is:
gnus
'bearded beasts' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for gnus that I've seen before include "Gun (anag.)" , "South African antelopes" , "Snug (anag) -- wildebeest" , "Large African antelopes" , "Big game" .)