Something fizzy a comrade’s drunk (5,4)

I believe the answer is:

cream soda

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'something fizzy' is the definition.
I can't tell whether this defines the answer.

'a comrade's drunk' is the wordplay.
'drunk' indicates an anagram.
'a'+'comrades'='acomrades'
'acomrades' with letters rearranged gives 'CREAM SODA'.

Can you help me to learn more?

(Other definitions for cream soda that I've seen before include "Sparkling stuff" , "Vanilla-flavoured fizzy drink" , "Carbonated soft drink" , "Vanilla-flavoured pop" .)

I've seen this clue in The Times.

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