Crossword Genius

Celiac disease trigger (6)

Ross

I believe the answer is:

gluten

(Other definitions for gluten that I've seen before include "Sticky protein present in cereal grains" , "Protein left after starch is removed from cereal grains" , "Substance contained in many grains" , "Protein found in cereals" , "Protein in cereal grain" .)

I've seen this clue in the USA Today.
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