Whiskey and biscuits? (7)

I believe the answer is:

bourbon

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'whiskey' is the definition.
(bourbon is a kind of whiskey)

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

(Other definitions for bourbon that I've seen before include "A drink" , "Rye whisky; biscuit" , "Whiskey - biscuit" , "Rye whiskey" , "Corn whiskey" .)

I've seen this clue in The Sun.

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