The crossword solution for the term 'Waters of Jazz' is ETHEL, a five-letter word. ETHEL is the name of a famous jazz singer and songwriter from the 1920s and 1930s. She was known for her powerful voice and her ability to improvise. Her most popular songs include 'St. Louis Blues' and 'Stormy Weather.' She was also a member of the Original Dixieland Jazz Band, one of the first jazz bands to record commercially.