Answer:
It has plenty of backbone but doesn't have a let. It peels like an orange but it comes from an egg.
Face with a tree, skin like the sea. A great beast I am. Yet vermin frightens me.
What kind of dog keeps the best time?
John Lennon sang about being this toothy creature.
What creature starts yellow inside and white outside, then becomes its first five before becoming the whole?
Bury deep, Pile on stones, My mind will always Dig up them bones