Possible Clues:

• Monk's condition, on the TV show
• Condition characterized by repetitive rituals, for short
• Detective Adrian Monk's condition
• Repetitive condition, for short
• Med. condition that may involve excessive hand-washing
• Neurotic condition, for short
• Anxiety condition, for short
• Condition attributed to Howard Hughes: abbr.
• Cause of a tic, for short
• Neat freak's condition, for short