Possible Clues:

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