Individually modeled teeth look odd on a cartoon character. Perhaps you could leave them out, or replace them with a solid band. Looks like he’ll be fun to animate.
I agree with Orinoco on the teeth. They are the first thing that sticks out. I’m not sure about his nose. Normally a clown would wear a separate nose or he would have some red makeup on his own nose. This nose looks like a mixture of both. It is oversized like a separate one and at the same time it appears to be the same mesh.
But anyway, well done and you did a good job on his hairs