But the thing is,can somebody help us to do a clan server?HELP!!!

You might want to all put in some money to pay for a dedicated server which runs a Teeworlds server.

You should get the oldest person in your clan to talk to a server company, or whatever.

It will cost you money.

You can always host one yourself on one of your clan members home computers. But that can be quite dodgy if the internet connection is used frequently for other purposes.