Hurley's a good coach. When Sanogo was in, they blitzed the PnR and had a high hedge and allowed Sanogo to get back on D and cover the roll man.
Clingan is playing drop coverage. Drop coverage works when you can cover as much ground as Clingan and can really protect the rim. He might get exploited by elite NBA 3-point shooters at next level, but that isn't gonna happen in college.
Clingan doesn't play a deep drop either. He is able to play away from basket and still protect the rim on the drop. It's good defense.
That said, Clingan looks to be at most 30 minute player. They ask him to do a lot. In fact, big men in modern basketball are asked to do way more running than in the old days.
Clingan plays drop coverage on D and has to cover a ton of ground on the backline. He then is expected Tyler Phommachanh rebound and run the floor as a trailor.
Think of modern NBA big men as pitchers in modern baseball. They don't pace themselves anymore. It's max effort every time. The days of Shaq catching a breath walking up the floor are over.
And, on offense, instead of a post-up ISO player, he is put in PnR action where he is a roll man. He moves way more than your traditional 1980s BIg Man used to move.