One issue to consider with Clemens is how little he would play when Turner returns (unless there's an injury to one of the infielders, or Schwarber). He's appeared in 9 games since his recall, two of them starts (one for Bohm, one for Sosa). Two appearances were in the late innings of blowout wins. In the other five, he pinch-hit for Sosa, a guy who won't be around to pinch-hit for very often once Turner returns.
If they keep him, Clemens is going to have to play the OF some to get much playing time. The Phillies haven't used him there yet this season (he played one game in RF last year), but Clemens has played a few games in the OF for the IronPigs this year and last. He played nine games in LF for the Tigers in 2022. He's probably worse defensively than the other Phillies outfielders except Castellanos, though. (I wouldn't mind seeing him get a few starts in RF.).