Possible Clues:

• Fluffy dessert
• Decadent, airy dessert (... letters 6-10)
• Cause of a diet setback, perhaps
• Stuff between some cake layers
• Lose case -- too much worried by example of 9
• Dessert choice
• He's a cool customer, almost ridiculously sweet
• It can be sweet catching rodent swallowing something initially from bakery
• Sweet type of dark brown rodent going around bend
• Sweet Disney film about horse getting behind deer, we hear