Possible Clues:

• Formality
• Provides a stiff one for celebrity going to church
• Carbohydrate found in potatoes, wheat etc.
• Small spot on the bottom of the foot creates a type of stiffness
• Carbohydrate in potatoes
• Symbol of stiffness
• Carb in rice and potatoes
• Laundry supply
• Carbohydrate in green plants
• Dry cleaner's supply