Abstemious duck guzzling energy drink (8)

I believe the answer is:

teetotal

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'abstemious' is the definition.
(I've seen this before)

I don't understand the rest of the clue.

(Other definitions for teetotal that I've seen before include "not taking a drop" , "Completely abstinent" , "Abstaining completely from alcohol" , "Completely dry" , "Not touching a drop" .)

I've seen this clue in The Telegraph.

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