I mean I guess they had some good wins, but their record was not that great. I did not realize anyone thought they could make the dance. I thought only Duke, L'ville, FSU, and UVA were the likely ACC teams.

From the link:
"Clemson: Though the Tigers have quality wins over Duke, Louisville and Florida State – three teams currently ranked in the top 12 of The Associated Press poll – their hopes of an NCAA Tournament bid probably came to an end with the loss to the Hokies. They settled too often for 3-pointers, making just 9 of 35 attempts, instead of capitalizing on Virginia Tech’s lack of size and that led to their downfall."