I hate clowns too! Yuck! At Christmas time I frosted Santa hats on my cupcakes. These were mini-cupcakes, but I think you could do the same thing, just with "clown-ish" colors. I just used a star tip, and swirled red frosting around the cupcake bringing the icing up, letting it build on itself until it was tall enough to look like a Santa hat. Then I used white icing to make the border of the hat and the little pom-pom on the end.
I tried to do this same thing using colors for NFL teams (I had extra frosting) and they turned out looking like clown hats!!
I hope this makes sense, I can't find the pic I took of the santa hats! They were so cute! I hope to at least get you going! Clowns are hard to use, they scare most people! Good luck!