Both Neymar and Kylian Mbappe scored hat-tricks against Clermont, extending Paris St-advantage Germain's at the top of Ligue 1 to 15 points.
Within 20 minutes, the visitors had a two-goal advantage, but Jodel Dossou's score cut the deficit to one.
A penalty from Neymar and Mbappe's second goal of the night made it 4-1 before the Frenchman completed his triple with a beautiful finish.
Late in the game, Brazil international Neymar scored his third goal of the night.
Lionel Messi also played an important role in the victory, assisting on PSG's first, second, and fourth goals at the Stade Gabriel-Montpied.
Third-place Marseille, who play PSG in 'Le Classique' next weekend, can close the gap at the top of the league to 12 points with a win against Montpellier at home on Sunday.