Related Clues:

• Fat-filled fare
• "The caveman diet"
• Modern diet based on a nonmodern era
• Hunter-gatherer diet
• Ultra-low-carb diet, for short
• Certain high-fat, low-carb diet, informally
• Diet based on the eating habits of early humans
• Diet that permits walnuts but not peanuts
• Diet high in fat
• Kind of high-fat diet used as an epilepsy therapy
• Diet less restrictive than keto
• 'Caveman diet,' familiarly
• Diet that precludes grains and dairy
• Diet that's high in fats and low in carbs, as illustrated by parts of the answers to the starred clues
• Kind of high-fat, low-carb diet