Ours quite polluted, how might the sea appear? (9)

I believe the answer is:

turquoise

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

'might the sea appear?' is the definition.
I can't judge whether this defines the answer.

'ours quite polluted' is the wordplay.
'polluted' indicates anagramming the letters.
'ours'+'quite'='oursquite'
'oursquite' anagrammed gives 'TURQUOISE'.

'how' is the link.

Can you help me to learn more?

(Other definitions for turquoise that I've seen before include "Greenish-blue stone" , "Blue-green" , "Aquamarine colour" , "Bluey-green" , "Greenish-blue gem" .)

I've seen this clue in The Times.

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