Lanius:
"Go for the jugular (vein)" is an expression which indicates that the most aggressive response is called for. This, in business, sports, self-defense situations, etc.
A juggler is a common entertainer found, as well as clowns, in circuses and other entertainment situations.
So in context with a clown, "go for the juggler" is a takeoff on "jugular."
There's a bad but well-known joke on which the thread title is based:
"How do you kill a circus clown?" "Go for the juggler."
And variants thereon.
http://www.facebook.com/group.php?gid=57485327718Terry, 230RN