Clermont will face Toulouse in the Top 14 final after an emphatic 33-13 defeat of Lyon in Bordeaux on Sunday.
Les Jaunards kept their double hopes alive a month after lifting the European Challenge Cup in Newcastle.
Clermont's first try of the semi-final was a stellar one with some slick handling from the lineout.
Isaia Toeava broke through the defence and offloaded to Aliverti Raka who beat a few defenders before offloading back to Toeava who sent the ball wide to Damian Penaud to score.
Penaud was in fine form in the encounter as he assisted a try later on in the game and was named man of the match.