Non-major antag mainly for helping newer people learn some of the main mechanics for syndicate / antagonists.
The syndie-clown has a pacifier and has a syndicate uplink, however they cannot buy any weaponry and can only buy non-damage causing items such as the pyjama bags and maybe the fake grenades
their "objectives" wouldn't be strict and more along the lines of a normal clown like "be funny".
Perhaps they also have the syndicate code-words but aren't counted to the objective list as another way to help teach new players how the codewords work.
And finally, perhaps this role could work similar to intern roles where only people with a low amount of hours in syndicate etc can get it, or perhaps playing as the syndicate clown are required before playing as a main syndicate member.