Berry had career highs with 31 points and seven 3-pointers as the 14th-ranked Tar Heels bounced back from their Atlantic Coast Conference opening loss with an 89-86 overtime victory Tuesday night.
Kennedy Meeks' basket with 1:12 left in overtime put North Carolina (13-3, 1-1) ahead for good.
"I was very disappointed with my shooting the other night," said Berry, who was 3 of 13 for eight points in the loss to the Yellow Jackets. "I just went back and put up a lot of shots. I know my team depends on me and I want to be a big-time player to help us win."
Berry was certainly that against Clemson (11-3, 1-1). He hit 12 of 19 shots, was seven of 10 from 3-point range and played all but 4 of the 45 minutes.
"I kept asking Joel if he was all right," North Carolina coach Roy Williams said. "It's been a long time since I had someone play 41 minutes."
The Tar Heels needed all of them to hold off the Tigers, who came in having won nine straight.
After Meeks' go-ahead basket, Justin Jackson followed with a bucket and Clemson lost its ninth straight - and 19th of the past 20 games - to North Carolina.
Berry scored 23 points after halftime and appeared to have North Carolina on the way to a victory, ahead 75-67 with less than 4 minutes left. Clemson, though, closed the period with a 10-2 run, capped by Marcquise Reed's tying 3-pointer with 29 seconds to go.
Meeks finished with 14 points and tied his career best with 16 rebounds. It was his fifth double-double this season.
Jaron Blossomgame had 24 points to lead the Tigers and Avry Holmes had 20 points.
Berry made nine of 13 shots after halftime, surpassing his career best of 24 points set against Oklahoma State this past November.
Whoa! Brad giving Roy the business in post game handshake after UNC beats Clemson in OT pic.twitter.com/ALDfm2Eg4x— Joe Mazur (@joemazurabc11) January 4, 2017
Clemson coach Brad Brownell said he was encouraged at how his team hung with the Tar Heels.
"We had a chance to win, but just didn't finish the job," he said.
Brownell appeared angry with Williams in the postgame handshake. Both coaches, though, declined to discuss the matter with the media. "It was something between Brad and myself. I took care of it," Williams said.
The Tar Heels had a huge edge underneath the boards on Clemson - they outrebounded Clemson 51-32 - but they kept shooting and missing outside shots. North Carolina hit just three of 10 shots from behind the arc and several times had the ball stolen when attempting cross-court passes.
North Carolina gets its first home ACC game Saturday night when it hosts rival North Carolina State.
Clemson faces another ranked team when it travels to No. 23 Notre Dame on Saturday.
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The Associated Press contributed to this report.
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