The whole point of joining a clan is to work together with your community and help eachother grow. It's understandable to a certain extent to further yourself first, but it only takes a couple of minutes to help somebody else. Even if you can't do something completely by yourself, you can always call in somebody to help you as well.
Without working as a team and helping eachother, what's the point in wearing the same tag?
I'm not saying you have to carry every person that asks through hell to level 90... But giving wp's or spare old runewords you were using, or helping to kill normal diablo, or giving bo / oak / conviction to your party, or anything really can help to get them going. There are a ton of things that can be done to help out others you play with!