Crossword Genius

Alarmed without ale or wee whisky (4)

Ross

I believe the answer is:

dram

I'm a little stuck... Click here to teach me more about this clue!

'whisky' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.

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

Can you help me to learn more?

(Other definitions for dram that I've seen before include "Measure of Scotch" , "Small drink (in Scotland)" , "Small drink of alcohol" , "Small drink of spirits" , "Pick-me-up" .)

I've seen this clue in the Irish Times (Crosaire) and the Irish Times.
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