Vary soda mix for native of SE French region (8)

I believe the answer is:

savoyard

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'native of se french region' is the definition.
I can't tell whether this definition defines the answer.

'vary soda mix' is the wordplay.
'mix' indicates an anagram.
'vary'+'soda'='varysoda'
'varysoda' with letters rearranged gives 'SAVOYARD'.

'for' is the link.

Can you help me to learn more?

(Other definitions for savoyard that I've seen before include "Southern Frenchman" , "GS fan" , "light opera performer" , "G&S aficionado" , "G & S devotee" .)

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

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