What some drinkers can wear? (6)

I believe the answer is:

shorts

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'wear?' is the definition.
(I know that shorts is a type of wear)

I don't 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 "Summer trousers" , "Trousers that end at or above the knee" , "Reduced trousers" , "Item of clothing; drinks of spirit" , "Cut-off trousers" .)

I've seen this clue in The Irish Independent.

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