The term 'HARD FAT' can be broken down into two crossword solutions: SUET (4 letters) and STEARIN (7 letters). SUET is a type of hard fat found around the kidneys and loins of animals, typically beef or mutton. It is used in cooking and baking, especially for making pastry. Stearin is a type of hard fat derived from animal or vegetable sources. It is used in the production of candles, soap, and cosmetics.