Relatives of vicuñas and guanacos (6)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
llamas
(Other definitions for llamas that I've seen before include "Camel-like animals" , "South American cud-chewing animals" , "Andean pack animals" , "domesticated guanacos" , "South American pack animals" .)