Possible Clues:

• Hardly a healthy feeling
• Sweating, shivering, fit (once)
• Feverish illness
• Fit time for storing uranium
• Time to accommodate superior, though it gives one the shivers
• Odd bits of gauze applied after a nasty illness?
• Colleague has a complaint
• Fever, fit, once
• Ill defined? Ill-defined a non-starter
• The French might make this long enough to give you the shivers