Possible Clues:

• Some Italian desserts
• Prettifies at a patisserie
• Treats, as a swollen ankle
• Frosts, as cupcakes
• Summertime treats
• Cool desserts
• 'They may be for Sundays, by the sound of them, when they're cold (4)'
• Lays on, as buttercream
• Cold treats
• Cinches the win