Clan tattoos are the only thing I can think of clan's needing.... That and maybe a private area for the clan leaders..
Like a clan fountain, limited to those who have obtained the leader status only and only to those who are in the clan..
For example I have 3 Guild Leaders and about 5 other people who can see the clan fountain...I'd like a place where only those who I've made Guild Leaders can sit and discuss world dom....I mean....how our day went..
basically.... -> Clan fountain + Gypsy Tent Clan Leader rooms..
but clan tattoos are the thing I am looking forward to most..