The phrase "clown outfit" refers to a person's clothing or overall appearance that is silly, exaggerated, or comical, resembling that of a clown's costume. Full definition
In Albania, Catholics — the only religious group that refused to cede power to that Communist state (though they were later forced to sign an agreement in which they submitted to state control)-- were tortured, their bishops «forced to clean the streets and public bathrooms wearing clown outfits with paper signs across their chests saying, «I have sinned against the people. (firstthings.com)
She steals every scene she's in, and not just because of her psycho clown outfit. (avclub.com)
The Pierrot character is dressed in his familiar clown outfit and holds a mandolin, but his face is a smooth robotic mask, crafted to resemble the image of Frantz Fanon. (kavigupta.com)