Possible Clues:

• Fancy headgear, right to overcome formality
• Sudden thought to put lid on food
• Fancy putting charge on current account!
• Fancy putting lid on food!
• Is a hundred cost of impulse?
• Fancy cereal kept under cover
• Unaccountable or unpredictable change of mind
• Mood determining fee charged by accountant
• A whim or piece of fancy
• A whim, or piece of music in lively fanciful style