The term 'Big Mama' is a nickname for several different people, including BLUES singer and pianist Willie Mae Thornton, American singer-songwriter Cass Elliot, and American BLUES musician PAPA Charlie Jackson. Cass Elliot was also known as Mama Cass, and her full name was Ellen Naomi Cohen, which can be seen in the crossword solution of CASS ELLIOT. PAPA Charlie Jackson was a BLUES musician who was known as 'PAPA' Charlie Jackson, and his crossword solution is PAPA. CASS is the crossword solution for Cass Elliot, and BLUES is the crossword solution for BLUES music.