The defense has done a remarkable job of getting off the field. Only two of 99 drives against the Clemson defense have lasted more than 5 minutes. Only two more have lasted between 4 and 4:59. That means 95 of 99 (96%) of opponent drives have lasted less than 4 minutes.
That’s not always good as the Tigers have given up some quick scores (Georgia and North Carolina come to mind), but for the vast majority of drives that’s a good thing. The defense does it’s thing and gets the ball back quickly.