Possible Clues:

• Blues legend
• Beale Street blues legend
• "The Thrill Is Gone" singer
• Blues great
• Lucille's owner
• Blues legend with a guitar named Lucille
• Bluesman whose guitar is named Lucille
• His blues brought him fame
• 'The Thrill Is Gone' hitmaker, 1970
• Robert Cray's 2003 album