Fraction of a min (3)

I think it could be either:

Which length description are you looking for?:

sec

(Other definitions for sec that I've seen before include "'Dry, as wine (3)'" , "period not lasting long" , "(Of wines) dry" , "Twinkling" , "21 down, as wine" .)

I've seen this clue in the Universal, The New York Times and the Newsday.

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