Answer:
I grunt and have a curly tail. People say I'm dirty but I'm actually very clean. What am I?
John Lennon sang about being this toothy creature.
They are producers of pies and burgers and are great for tipping.
It has plenty of backbone but doesn't have a let. It peels like an orange but it comes from an egg.
A pony trots his way through the world on these.
You use it between your head and your toes, the more it works the thinner it grows.
Animal
Difficult
Easy
Food
Funny
Kids
Logic
What am I?