Possible Clues:

• Med. condition with repetitive behavior
• Anxious med. condition
• Neatnik's possible condition, briefly
• Monk's condition, in the TV show
• Condition with rituals, in brief
• Anxious condition, for short
• Repetitive condition, briefly
• Detective Adrian Monk's condition
• Anal, casually
• Med. condition that may involve excessive hand-washing