Zesty taste (4)

I believe the answer is:

tang

(Other definitions for tang that I've seen before include "Tart taste and Chinese dynasty" , "Coarse seaweed" , "Old dynasty" , "The biting flavour of seaweed" , "tastefulness" .)

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

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