Related Clues:

• Rigorously abstinent
• Mahatma Gandhi, for one
• One who doesn't work well with others
• Hardly a hedonist
• Asocial sort
• One who's not a company man?
• Like some monks
• Abstainer
• One leading a spartan lifestyle
• "Table for one" type
• Misanthrope, often
• Mountain man, maybe
• St. Jerome, notably
• One not mixing well
• Unsocial type