Related Clues:

• Single
• Alone
• Sole
• Unaccompanied
• Without company
• A room of one's own
• Lone
• On one's own
• Being the only one
• Sole, only, lone
• Lacking companions
• Sole, lone
• 'Sole, lone (8)'
• Thus lighted, the ray alone is twisted
• That sounds like a loan