We use the clan chat option on the app,, also with clans now being multi platform it gives you the option to promote anyone in your clan to co leader or even the leader.
I get the clan chat but I do not see any of my xbox clan members on the ghost app.
When you click the helmet icon to manage clan and go into the manage clan portion. Look at the top right again. Youl'll see either xbox, ps3, pc.. click it and you can change between platforms