Crossword Genius

A small marsupial studied painting by the sound of it (7)

Ross

I believe the answer is:

dunnart

I'm a little stuck... Click here to teach me more about this clue!

'a small marsupial studied' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'painting by the sound of it' is the wordplay.
I cannot really see how this works, but
'painting' could be 'art' (painting is an art) and 'art' is found within the answer.
The remaining letters 'dunn' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.
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