If there is a new clan system
Where there will be separate page create for ranked gaming client clans
It will be good enough!
People can send clan requests on the page, when the owner or the clan lord, gets online he may accept it.
For getting invites it wont be necessary for the lord and the new joiner to stay online together
It will be helpful!
And even on that page...we can give the clan details and information
Hope u guyz like my suggestion!