I have a clown tang in my tank he's a baby I also have a naso tang and a yellow tang they never have fought and I have him eating and he barely swims at high speeds
Wait a while - as the clown gets bigger, it gets exponentially more aggressive, especially towards other tangs. If it doesn't die first from inadequate water conditions, it will eventually kill your other fish.
Well if he tries hes eventually going to lose
Someone is going to lose. You! You lose either an expensive clown tang, or something else. Clown tangs are not too bad in a 500 gallon system, and may actually become "friends" with other tangs. In smaller systems, not so much, mostly destruction.
The clown tang wasn't expensive also the clown and the naso are temporal guest because when they grow big I trade it for another fish and they will go to other people with experience or on one of there display tanks