Possible Clues:

• "Like a Rolling Stone" singer Bob
• Bob whose mumbling is less charming in his 70s
• ''It Ain't Me Babe'' composer
• Kennedy Center honoree of '97
• Rock legend featured in 'Electric Ladyland'
• 2000 Oscar winner for Best Song
• Grammy winner for 'Time out of Mind'
• Bob's next to nominate Thomas
• Bob (musician) or Thomas (poet)
• A Thomas from Wales