She was racing from 4lbs out of the handicap, but made light of that, after Tommy Treacy sent her for home coming away from the fourth last.
Brogella erred two out, but kept going powerfully to beat Adamant Approach by six lengths, with top weight and favourite, Essex, well held in fourth.
Winning trainer, Frances Crowley, wasn't at the meeting, but reported by phone that the mare would not be covered again and would race next season.
Tony McCoy rode his first ever winner on the track when partnering J P McManus' Poc Fada to take the Gleneagle Hotel Handicap Chase.
“I can't even remember riding here”, said McCoy. “If I did it was in the days when I was with Jim Bolger.”
Everything went right through the contest for Poc Fada. He was in the air with Time To Sell, both horses appeared to be full off running, when that challenger fell three out.
Then Adonia ranged up as a big danger heading to the last, but was none too good at the obstacle and that made all the difference in the end.
McCoy partnered uneasy favourite Kadoun in the O'Connor, Sutton and Cronin Consulting Engineers Chase, but not for the first time he showed little enthusiasm and was under the cosh with a full circuit to go.
In contrast eventual winner Brutto Facie, trained by Jessica Harrington, travelled sweetly for the capable Andrew Leigh, leading four from home and staying on from the last to hold Randwick Roar.
Harrington was represented by her husband, Johnny, who said that Brutto Facie would now go out on grass.
Odds-on chance Breathing Fire, also in Harrington's care, proved very disappointing in the Killarney Towers Hotel Maiden Hurdle.
Taking a major drop in class, following decent efforts at Cheltenham and Punchestown, he failed to get to grips with 20-1 shot Artiste Bay.
The winner led over the second last and the market-leader soon held every chance, but found nothing for pressure.
It was a fifth success for pilot, Tom Molloy (19). “He rides out a lot for us and is a promising lad”, said trainer, Eoin Griffin. “Our horses were wrong through the winter and it is only in the last month they have come right.”
Laura Hourigan rode her 14th winner when grabbing the Dawn Reid Ladies Handicap on Michael Grassick's Pine Valley.
She forced her to the front well inside the final furlong in a contest in which you could have thrown a good-sized blanket over the first six.
Said Grassick: “She likes soft ground and will keep tipping away, as long as their is cut.”
Arthur Moore's newcomer Bien Bronze cantered to the front two furlongs out to take the Bumper in smooth style.
Returned at 14-1, he gave rider Sonny Carey his eighth winner. Willie Mullins' Alexander Buffet again disappointed. He was beaten at 8-11 on his debut at Leopardstown and found nothing on this occasion when asked to race by Katie Walsh.
Tony Seymour's Threequarter Moon swept ahead coming away from the third last, looking set for a comfortable win in the Killarney Grand Hotel Handicap Hurdle.
In the end, however, she had to be hard driven by Eddie Power to hold the fast-finishing Wheresben, the verdict a short head.