Because of a balance issue, the Clan moves have been nerfed considerably. They're still stronger, but there's restrictions on where you can use them and the damage they deal out has been put down considerably, and the SP use has gone up. Also, everyone now has just one Clan move because the extra moves that RC and SkC cats had were just watered down versions of Leap-and-Hold.

This is because if a leader were to use their Clan move on another cat, they'd either be knocked out before they could land a hit or they'd lose most of their HP. And this is any cat of any rank, by the way.

So you'll still have an advantage if the conditions are right, but you won't be able to completely destroy another person and it gives them a fighting chance. Check the Battle System topic for the new damage and stamina changes.