The term 'ingredient in some protein powders' can be summarized by the crossword solution 'HEMP'. HEMP is a plant that is used to make a variety of products, including protein powder. HEMP protein powder is a popular choice for those looking for a plant-based source of protein. It is high in essential amino acids and is a good source of fiber, vitamins, and minerals. HEMP protein powder is also known for its mild flavor and creamy texture.