Drinks in the cinema? (6)

I believe the answer is:

shorts

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'drinks' is the definition.
(short can mean a drink of spirits)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for shorts that I've seen before include "Garment" , "Cut-off trousers" , "Item of clothing; drinks of spirit" , "Reduced trousers" , "bottom gear" .)

I've seen this clue in the Evening Standard.

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