Well, we already know of multiple characters who are confirmed to show up some time in Arc 7, all with important roles, as well as being from the Emilia camp. Clind is not one of them sadly. That isn't to say he WON'T show up. All Tappei did was confirm some characters that are gonna be there. But I don't know, It's probably unlikely. As far as I'm aware, he hasn't said whether Clind will have an important role in any arc. Even Petra has an arc important role coming. I don't think Tappei has any interest left for Clind honestly.