Possible Clues:

• Base for sauces
• Butter-and-flour mixture
• Sauce thickened with flour and fat
• Soup thickener
• Flour-and-fat sauce thickener
• Butter/flour mix
• Mixture of fat and flour used as a base for sauces
• Thickening mixture
• Fat and flour mixture as a basis for sauces
• Mixture of flour and fat for cooking