Come to Realize Your Fear
Most people do not admit that they fear clowns, but on the inside, it is quite evident that they do. The first step to overcome such a phobia, or any other for that matter, is to actually realize its existence. Without doing so, trying to overcome it by yourself will become near to impossible. Talk to your friends and family members about how you consider it to be affecting your life in a negative manner, which will ultimately ease the stress on your shoulders of not having anyone else know about your fear.
Visit Clowns and See How They Are
When you consult with the people around you, the most common answer will be that clowns are just normal people dressed up in that way and work for a living laughing and having fun with others. Visit a circus, rodeo or any other event with clowns in it and interact with them. You will get to know that they are just like anyone else you know, but a lot more fun to be around.
Become a Clown
When there is a fear of something, you have to overcome it by doing it. Some people are afraid of driving but after actually experiencing it, the feeling liberates them and takes the fear away. Same goes for coulrophobia. Dress up as a clown and request your friends and family members to join you.
Relax and Visit a Psychologist
When every other attempt fails, visiting a mental health professional like a psychologist is a great way to get some expert advice on how to overcome your fear. A psychologist is a person who you can really open up in front of and he/she will never doubt you as a person, but will motivate you in each and every possible way.