A very basic ClearChat plugin! Simply drag into your plugins folder and reload the server.
/clocal - Clears local chat (allowed for everyone) [clearchat.local]
/cglobal - Clears global chat (OP) [clearchat.global]
/cother <playername> - Clears another player's chat (OP) [clearchat.other]
/cmute - Mutes chat (Type again to disable) (OP) [clearchat.mute]
Permission to exempt /cother: [clearchat.other.exempt]
Permission to exempt chat mute: [clearchat.mute.exempt]
If a player is OP, they are allowed to be exempt to any mute in progress on the server and able to exempt the /cother command.