Possible Clues:

• Extreme introvert
• Timon of Athens, e.g
• St. Benedict, e.g
• I'm flipping behind woman with time for loner
• Type of crab
• Mrs Romney's man? They say he's retired from public life
• Keeps to himself his companion is at college in America
• Keeps to himself as his companion goes to college in America
• The woman's small creature, mostly a retiring type
• Keeps to himself, as his companion goes to college in America