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Outback service mixing cold, frosty gin (6,7)

Ross

I believe the answer is:

flying doctors

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'outback service' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.

'mixing cold frosty gin' is the wordplay.
'mixing' is an anagram indicator.
'cold'+'frosty'+'gin'='coldfrostygin'
'coldfrostygin' is an anagram of 'FLYING DOCTORS'.

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