Related Clues:

• 55-Across, e.g.
• How Santa travels
• With no other
• Man from U.N.C.L.E.
• Han of "Star Wars"
• Unaided
• Unaccom-panied
• Emulating Garbo
• Unexcelled
• Like Crusoe before Friday
• Sans staff
• Lead guitarist's moment
• Lacking a mate
• Sans assistance
• Without peers