You have to figure Clippard is moving somewhere (I don't see him taking the closer role from Doolittle, and paying a setup man $8 mil or so for a small market team seems silly). A catcher on a short term deal would make some sense, since they can move Vogt around as needed (like the outfield now), and they may not be too eager to rely 100% on Phegley yet.
I suspect Beane already has a good idea of where Clippard can be moved, or he wouldn't do the trade. Of course, he also traded for Johnson last year, so who knows.