Related Clues:

• Without siblings
• Exit ___ (lane marking)
• The 'O' in CD-ROM
• 'Employees ___'
• "Employees ___"
• Sale modifier
• Having no siblings
• "If ___ I had known ..."
• Restrictive membership word
• Solely, lone
• . . . . the Lonely (sung by Roy Orbison)
• Existing alone with no other, perhaps a child
• There's nothing but sole like this
• One might want this in an abandoned way
• Want this sole to an immoderate extent