I guess you mean player clans?
I'm not a fan of clans because it dives the community into select mini-societies.
Clans have there place in MMORPGs because the grouping of individuals in this environment allows them to be more powerful per capita when compared to the rest of the community. A Clan allows the group of people to offset the natual trading enviroment at the cost of secular actions. Since Elements has no trading community and no benefit for working together against another player, I can only see it as a bad thing.