Possible Clues:

• Bound to get caught by a government agency, which would make a 13 across out of the question?
• Unwanted falling-out with one having to run anti-crime organisation
• Condition for Homer Simpson and Michael Stipe
• Medical condition causing hair loss
• Condition for Homer
• Toupee wearer's problem
• Reason for buying a rug?
• Salon special not protected repeatedly for loss of hair
• Baldness, to physicians
• Which comes as no shock to those who have it