There should be clan heads/leaders of each clan voted by the members of the clan, clan section in villages with a house for the clan members to respawn in if they die would be a sexy touch, but it'd be just that only sexy and useless. But I also think that the Clan section/area/division/whatever you wanna call it could hide clan secrets similar to the Uchiha's Sharingan secret room. But everything in this post right here is pure luxury and unneeded, just thought I'd throw my two cents in the jar.