Not stormy but quite changeable (5)

I believe the answer is:

quiet

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'not stormy' is the definition.
I can't tell whether this definition defines the answer.

'quite changeable' is the wordplay.
'changeable' indicates anagramming the letters.
'quite' anagrammed gives 'QUIET'.

'but' is the link.

Can you help me to learn more?

(Other definitions for quiet that I've seen before include "Hushed; undisturbed" , "Shh!" , "Silence, calm" , "Calm, hushed" , "Hush" .)

I've seen this clue in The Globe and Mail.

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