Edible powdery starch obtained from certain palms (4)

I believe the answer is:

sago

(Other definitions for sago that I've seen before include "Starchy pudding cereal" , "Type of milk pudding" , "Starchy foodstuff" , "Powdery starch from a palm" , "Powdery starch used in cooking" .)

I've seen this clue in The Guardian.

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