Crossword Genius

Courage beer in this (6)

Ross

I believe the answer is:

bottle

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

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for bottle that I've seen before include "Glass liquid container or slang courage" , "Heart" , "confidence" , "Narrow-necked vessel" , "Device used by beer drinkers" .)

I've seen this clue in The Sun.
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