Crossword Genius

Rarotonga district has argon air mixture (8)

Ross

I believe the answer is:

arorangi

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'rarotonga district' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'argon air mixture' is the wordplay.
'mixture' indicates anagramming the letters.
'argon'+'air'='argonair'
'argonair' with letters rearranged gives 'ARORANGI'.

'has' acts as a link.

Can you help me to learn more?

I've seen this clue in The Hindu.
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