Lower gas fast making a drink (5,2,5)

I believe the answer is:

glass of water

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

'lower gas fast making' is the wordplay.
'making' indicates an anagram.
'lower'+'gas'+'fast'='lowergasfast'
'lowergasfast' with letters rearranged gives 'GLASS OF WATER'.

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

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