Possible Clues:

• ___-free restaurant
• Wheat substance
• Surfeit eaten but not swallowed is a problem for some diners
• Too much eaten outside — some people can't take it
• Wheat protein which makes dough sticky
• What celiacs avoid
• Endlessly unhappy camp? Some can't take it in
• Almond flour's lack
• Celiac disease trigger
• Protein substance — nut gel (anag)