* The clown made the children laugh with his silly antics.
* He was a clown in the circus, juggling balls and making funny faces.
* The clown had a red nose and a bright, colorful costume.
* Don't be a clown! (meaning "Don't act foolishly!")
* The comedian's act was so bad, it was like watching a clown try to perform brain surgery.
* The play featured a tragic clown who lost his love.
Let me know if you want more examples!