The term 'Fake Fat in Some Chips' refers to the artificial fat substitute Olestra, which is used in some brands of chips. Olestra, also known as Olean, is a five-letter word that is the solution to the crossword puzzle. Olestra was developed by Procter & Gamble in the late 1990s and is made from sucrose and fatty acids. It is calorie-free and has been approved for use in food products by the FDA.