Australian makes organ using oak (8)
I believe the answer is:
kangaroo
'australian' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'organ using oak' is the wordplay.
I cannot quite understand how this works, but
an anagram of 'organ' is 'ngaro' which is within the answer.
an anagram of 'oak' is 'kao' which is located in the left over letters.
No letters remain.
This explanation may well be incorrect...
'makes' is the link.
Can you help me to learn more?
(Other definitions for kangaroo that I've seen before include "Marsupial that boxes" , "The sort of court" , "Large Australian mammal" , "Pouched animal" , "impromptu kind of court" .)