Miss Lahar led home a British-trained one-two in the Dark Angel European Breeders Fund Sweet Mimosa Stakes at Naas.
Trained by Mick Channon and ridden by Johnny Murtagh, she just got up on the line to deny Rae Guest's Minalisa after an exciting battle.
The latter tried to make all in the hands of Fran Berry, but Murtagh timed his run to perfection on Miss Lahar (15-2) to prevail by a head.
Murtagh told At The Races: "Mick was happy with her and said she was very honest.
"She's very game, very honest and battled right to the line.
"I rode her mother (Brigadiers Bird) to win and now I've ridden her."
Boston Rocker finished third while the Aidan O'Brien-trained Snow Queen trailed home a distant last after initially refusing to start.
Aidan O'Brien's Fortify made light work of justifying 8-11 favouritism in the Michael Higgins & Co. Race, making the running under the trainer's son, Joseph, and readily pulling clear of Hot Bed.
Connor King's stocks continue to rise and there was a lot to like about his front-running ride on Sign From Heaven in the Irish Stallion Farms EBF Maiden.
David Wachman's 11-8 favourite was sent straight to the head of affairs by the promising apprentice and was not for catching.
Market rival Hurryupharriet gave chase but she was ultimately held by three and a half lengths at the line.
Lily's Star claimed a third victory on her 44th career outing in the Final BBQ Evening Handicap.
The Harry Rogers-trained mare was dropping in class after finishing fourth at the Curragh and just edged out Patrickswell by a nose in a tremendously tight finish.
The fitting of a tongue-tie brought about significant improvement in She's Not Simple, who took the Network Ireland Kildare Supporting Women In Business Maiden under Tadhg O'Shea.
Jimmy Lambe's filly was well held on her first two starts over a mile earlier in the month but the drop to six furlongs saw the 33-1 outsider off the mark by a length and a quarter from Cottrell.