There should be clan emblems, shaders, emote, and sparrows that the leader can create. The leader could chose colors or use their clan logo or they can put the clan's name on the the emblems, sparrows, etc.. This will be cool so you can look cool with your clan members when playing crucible or just hanging out in the tower. Another idea is weapon skins that you make you can be unlocked through quest or missions and you could make special clan skins for your clan member's skins. This is just a idea I was thinking about, plus I am procrastinating the work I have to get done.