The pair are former Barnsley teammates.
Clark said: “I came through at Barnsley with him, I know him really well. I've known him since he was six or seven and now he's playing midfield, so I'll probably kick him a few times when we play them, I'll boot him around the pitch a little bit.
"He's not done too bad to be fair, he's still as daft as a brush, he's not changed at all, which is always the best thing. You see someone go to the top like that, it can change people, but he's still the same guy.
“I think maybe the week leading up to the game, I'll send him a text saying wear your shinpads!"