I'm getting a bit annoyed. No matter where I go, I can't find the Make a Social Group button. I even quit both of the groups I'm in just to see if that was the problem, it didn't work, so I rejoined 'em. But I can't find it, and I always have to use Google to access the groups, because I can't find the place to click. Thanks for your time.
You go to your public profile (upper left of screen where it says 'Hi, <Insert name here>') and go to group memberships. You should then see a link that says join social groups. Then, under the 'your groups' area there is a link that should say 'create a new social group'.
EDIT: Nin-jarred and forgot to put the stuff about being in a clan.