Former Bok centre Marius Joubert tasted Top 14 success as Clermont beat Perpignan 19-6 in the final at Stade de France.
It was the first time that Clermont had won France’s domestic decider in 11 attempts.
Right wing Napolioni Nalaga scored Clermont’s only try, while scrumhalf Morgan Parra kicked a conversion and three penalties, and fullback Anthony Floch slotted a drop goal.
For Perpignan, fullback Jerome Porical kicked two penalties, but he missed four other attempts at goal that proved costly.
Meanwhile, the Neath-Swansea Ospreys beat Leinster 17-12 in the Celtic League final.
First-half tries from right wing Tommy Bowe and Man of the Match fullback Lee Byrne gave the Welsh side a 14-3 lead at the break. Flyhalf Dan Biggar kicked both conversions and added a penalty in the second half.
For the Irish club, No 10 Jonathan Sexton kicked four penalties.