A little spirit is all (3)

I believe the answer is:

tot

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'a little spirit' is the definition.
(small amount of an alcoholic drink)

I can't explain the remainder of the clue.

(Other definitions for tot that I've seen before include "An arithmetic babe?" , "Add - youngster - dram" , "Small measure for a small child" , "Calculate" , "Palindrome for small child" .)

I've seen this clue in the Sydney Morning Herald.

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