Australian arboreal marsupials (6)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
koalas
'australian arboreal marsupials' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for koalas that I've seen before include "Australian tree-climbing mammals" , "Tree-climbing marsupials in Australia" , "Australian tree-climbing marsupials" , "Australian arboreal marsupials" , "Cute animals" .)