To have the clan appear in game, you will need to set the group as your active clan. To do this, you will need to be using a computer. Once you have that, sign in on the Bungie website and link your Microsoft account, if you haven't already. Then go to groups and select the group DETH Republic, scroll over to the Xbox Clan tab near the top of the screen and select that. Once that is done select Set as Active Clan and then the clan tag should appear in game. If you are having any trouble at all (it doesn't necessarily have to be on this topic) feel free to pm me or message my GT: NALO117