Rhizome used as a spice (6)

I believe the answer is:

ginger

(Other definitions for ginger that I've seen before include "Fred Astaire's partner - Greer's gringo (anag)" , "Hot-tasting root or general liveliness" , "Root or spice, often served with sushi" , "Spicy root, often served with sushi" , "Reddish-yellow; Twenty across" .)

I've seen this clue in The Times.

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