Crossword Genius

Cassava starch (7)

Ross

I believe the answer is:

tapioca

(Other definitions for tapioca that I've seen before include "it thickens" , "Pudding thickener" , "I act OAP (anag) - edible substance made from cassava" , "Starchy pudding" , "Cassava product used for puddings" .)

I've seen this clue in The Star Tribune.
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