Crossword Genius

Alien naïve, perhaps, to orbit rising star (8)

Ross

I believe the answer is:

venusian

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

'alien' is the definition.
Both the answer and definition are singular nouns.
Maybe they are linked in a way I don't understand?

'naive perhaps to orbit rising star' is the wordplay.
I cannot really see how this works, but
'star' could be 'venus' (I've seen this before) and 'venus' is located in the answer.
The remaining letters 'ian' is a valid word which might be clued in a way I don't see.
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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