A small assortment of animals (6)
I believe the answer is:
llamas
'animals' is the definition.
(I've seen this before)
'a small assortment' is the wordplay.
'assortment' indicates an anagram.
'a'+'small'='asmall'
'asmall' anagrammed gives 'LLAMAS'.
'of' acts as a link.
(Other definitions for llamas that I've seen before include "Sal and Mal for the animals" , "South American pack animals" , "domesticated guanacos" , "South American cud-chewing animals" , "Andean pack animals" .)