South American pack animals (6)
I believe the answer is:
llamas
'south american pack animals' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for llamas that I've seen before include "S American animals related to the camel" , "South American cud-chewing animals" , "South American animals like the camel" , "domesticated guanacos" , "South American pack animals" .)