The crossword solution for the term 'Soup Cube' is 'CROUTON, ' which is a seven-letter word. Croustons are small cubes of fried or toasted bread that are often used as a garnish or accompaniment to soups and salads. They are usually made from white bread, but can also be made from other types of bread, such as rye or whole wheat. Croustons are typically seasoned with herbs and spices, such as garlic, onion, oregano, and parsley.