When creating a clan you can choose what ever ranks you want. Usually there is Owner, Officer, Elite and Member. Owners being the ones who run the clan, officers being those who can find clan battles and help the owners. Elites who are usually the better players or ones who have shown commitment to the clan and members are just everyone else in the clan. If I didn't manage to answer your question just private message me and I'll try to be a bit more clear.
QA;TL