High weirdness by radio, made by parody songsmith Ogden Edsl. Edsl was most known for his Dr. Demento chart topper, "Dead Puppies". Unlike the more common but sarcastic take on death of "Dead Puppies", this was possibly one of the first "pedo creep" clown songs. Sure, evil clowns from the reality of John Wayne Gacy and to fictional of Pennywise were around but this was before the taboo breaking and now very common Michael Jackson-related jokes. And really was't Michael Jackson a multi-billion dollar (media) circus clown?
So, let's go back to 1979 (!) with some dementia Also, there's this warped lo-fi video version
Interestingly, this came about before Kinko's the copy store was around.