Crossword Genius

Japanese population’s essential goal to consume reduced alcohol (5)

Ross

I believe the answer is:

osaka

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'alcohol' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for osaka that I've seen before include "Place" , "Port city of southern Honshu" , "Major port and commercial and industrial centre on Honshu" , "S. Japan port, bay" , "Far East city" .)

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