Related Clues:

• Bedridden, e.g.
• 57-Across, e.g.
• No mixer
• Not the gregarious type
• Unsociable sort
• One not mingling much
• Hardly a company man
• Self-denying
• One who doesn't mingle
• Hardly self-indulgent
• Garbo, by choice
• Leaver of the pack?
• Cage up
• One averse to mingling
• Antisocial person