South American ruminant (5)
I believe the answer is:
llama
'south american ruminant' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for llama that I've seen before include "Domesticated pack animal of the Andes" , "one that ruminates" , "One bearing burden" , "S.American animal" , "Andean camelid" .)