Booker scored 45 points, his seventh 40-point playoff game, in the Suns' 129-124 triumph against Los Angeles Thursday night at Crypto.com Arena.
Phoenix led the Clippers, who played well without superstar forward Kawhi Leonard, 2-1.
The Suns' 2022 playoff journey was notable for their 33-point home defeat to the Dallas Mavericks in Game 7 of their semifinal series after a franchise-best 64 victories.
The Suns' guard was expected to lead the team out of a difficult summer in which previous owner Robert Sarver was found guilty of racism and sexism.
Booker averaged 27.8 points this season. As he has scored 26, 38, and 45 points against the Clippers, his playoff performance has improved.
Booker joins Charles Barkley as the only Suns players with five postseason 40-point performances.