Possible Clues:

• Toucan Sam's cereal
• Cereal brand
• Cereal with a spokestoucan
• Colorful cereal
• *Colorful cereal with the mascot Toucan Sam
• Breakfast cereal with a toucan mascot [69-Across!]
• Toucan Sam’s bowlful
• "Follow your nose!" cereal
• Kellogg's cereal
• Kellogg's ring-shaped cereal