This holds liquid courage! (6)

I believe the answer is:

bottle

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'courage' is the definition.
(bottle can mean courage)

I cannot understand how the rest of the clue works.

(Other definitions for bottle that I've seen before include "Glass container - firmness of resolve" , "beer found in this?" , "Glass liquid container or slang courage" , "Nebuchadnezzar?" , "Nerve (sl.)" .)

I've seen this clue in The Sun.

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