Ok, so here’s my take on this. I’m not an authority, but I grew up 4 miles from Clemson, attended college there, worked there and have been a fan my entire life. There are basically three different camps in this argument. First, there are those who say Clemson is promounced just like it sounds. I can live with that, but I beg to differ. As a Clemsonite with orange blood and a pure South Carolinian, Clemson is pronounced as if there were a “P” between the “M” and the “S:” C-L-E-M-P-S-O-N! The other argument is that it’s pronounced with as if there were a “Z” between the “M” and the “S.” I can handle people not saying it with a “P,” but in absolutely in no way, shape or form does or has Clemson ever been properly said with a “Z!” If someone pronounces Clemson with a “Z” in it, you can rest assured they have either never heard it pronounced appropriately or, more likely, they are from the North!
It’s a very suttle and soft “pu” sound there, but it’s there. What camp are you in? Go Tigers!