Spooner's to use motivational tactic getting a drink in America (4,4)

I believe the answer is:

root beer

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'drink in america' is the definition.
'root beer' can be an answer for 'drink' (I've seen this before). I am not certain of the 'in america' bit.

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for root beer that I've seen before include "Non-alcoholic beverage" , "Drink (mostly in US)" , "American soft drink" , "Mostly American drink" , "Fizzy drink (mainly US)" .)

I've seen this clue in The Independent.

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