Possible Clues:

• Animal that eats a variety of food of both plant and animal origin
• One who eats both meat and vegetables
• I'm on an unrestricted diet and rove around on the other part of the bus
• Northern chap in Cockney's house, one who'll eat anything
• There's nothing I can't stomach!
• It eats other animals or plants, as human does
• Northern bloke in East End residence, an unfussy eater
• Bear or human
• Room twenty-three reserved for unfussy diner
• Eater of plants and animals