Related Clues:

• One often on the move
• "Let Me Entertain You" musical
• "I Am a Lonesome ___" (Bob Dylan song)
• Spacecraft on Mars
• Bum kin
• A wandering dog?
• Perpetual traveler
• Boxcar Willie dressed as one
• Wanderlust sufferer
• Nonpaying train rider, perhaps
• Roaming type
• Nomadic
• Exploration vehicle
• Perpetual roamer
• ''Grapes of Wrath'' character