The term STEW BASE can be solved by two crossword solutions: BROTH (5 letters) and OYSTER (6 letters). BROTH is a type of liquid food made by simmering meat, vegetables, or other ingredients in water or stock. It is often used as a base for soups and stews. OYSTER is a type of edible mollusk that is usually served raw on the half shell or cooked in various dishes such as stews. OYSTER stew is a popular dish that is made with oysters, butter, cream, and seasonings.