Sung Hyun Park sprinted to the finish in the weather-abbreviated LPGA Texas Classic, chipping in for birdie on the final hole to claim a one-shot victory.
The 24-year-old South Korean, the highest-ranked player in the field at No.5, closed with a five-under 66 in the second and final round to finish at 11 under.
Park needed that chip to drop to survive a late charge by American Lindy Duncan, who birdied her final three holes for a 64, the low round of the tournament.
Park finished with a two-round total of 11-under 131 for her third LPGA Tour victory and first since last season, when she won the U.S Women's Open and was named Co-Player of the Year and Rookie of the Year.
Rookie Yu Liu closed with a 66 and finished third, two shots back.
Ariya Jutanugarn (66) and Sei Young Kim (67) were another shot behind.
Minjee Lee was the best-placed Australian in a tie for 19th after a round of 70 left her at four under.
Katherine Kirk carded a 69 to be shot further back, Su Oh (72) was at two under while Karrie Webb (70) and Hannah Green (69) were tied for 46th at one under.
The event was reduced from 72 holes to 36 after Thursday's round was cancelled and Friday's play was delayed by eight hours because of rain.
It was the LPGA Tour's first 36-hole event since the Bahamas-LPGA Classic in May 2013, which was cut short because of flooding.