The game was tied 27-27 at halftime. Tech (17-10 overall, 8-5 Atlantic Coast Conference) managed to take a 42-36 lead with 12:46 left in the game on Nnamaka's 3-pointer, but Clemson (12-15, 4-8) rallied and tied it at 48 on Adrianne Bradshaw's jumper with 8:44 left.
The game was tied at 57 before Jacqua Williams gave the Yellow Jackets the lead for good by hitting a free throw with 1:24 left.
Clemson's Tasha Taylor led all scorers with 17 points. Janie Mitchell had 13 for Georgia Tech.
NO. 2 TENNESSEE 56, NO. 7 LSU 51
Candace Parker had 27 points and 13 rebounds to help the No. 2 Volunteers hold off their conference rivals.
Tennessee never trailed, but LSU tied the game at 51 on Sylvia Fowles' free throws with 1:21 to go.
Parker put Tennessee back ahead with a free throw after she was fouled on a crucial offensive rebound. Then Shannon Bobbitt made a pair of foul shots after Sidney Spencer's seventh offensive rebound - and Tennessee's 20th overall - to give the Lady Vols a 54-51 lead.
LSU had a chance to tie it, but Quianna Chaney's 3-pointer rimmed out.
Bobbitt finished with 13 points, including three 3-pointers, for Tennessee (25-2, 12-0 Southeastern Conference), which has won eight straight since a 74-70 loss to No. 1 Duke.
Fowles had 18 points and 16 rebounds for LSU (23-5, 9-3), which has lost two in a row at home since No. 3 Connecticut snapped the Lady Tigers' 43-game home winning streak that dated to February of 2004.