The best replacement for clown is mime.

The best alternatives to clown are rated as following:
★★★★★  mime
★★★★  joker
★★★★  krump
★★  crush
★★  magician
★★  cop
★★  krumpers
★★  fool
★★  jester
★  harlequin
★  cop milwaukee
★  jerry the king lawler
★  clown
★  heath slater
★  hunter hearst helmsley
★  mascot
  barber
  crump

Your alternative for clown is not listed? Suggest!
Speaking about clown, one probably shouldn't forget about circus.

Other search terms related to clown and their ratings are:
★★★★★ circus
You have in mind a companion for clown and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of clown in all years. Click on graph for more.
clown
mime
joker