Brooch ably justified odds-on favouritism in the Vincent O'Brien Ruby Stakes at Killarney to extend her unbeaten record to two races.
Dermot Weld's filly won by nine and a half lengths on her debut at the Galway Festival in July and took the next step along the ladder in this Listed race over eight and a half furlongs.
It was harder work this time, but Pat Smullen's partner (8-11 favourite) got the job done quite tidily in the end.
The daughter of Empire Maker, owned by Khalid Abdullah, was buried in mid-division for a long way as Dark Skies and Colour Blue cut out the early running.
Colour Blue gamely stayed in contention, and was still in front passing the one-furlong marker when runner-up Akira also joined the party.
But Brooch was bustled on the outside of that duo by a composed Smullen to pounce by a length.
Kris Weld, the victorious trainer's son and assistant, said: "That was very pleasing.
"It was a big skip from winning a pretty average maiden to this.
"She's a big, fine filly and is only starting to fill out.
"She'll make a nice four-year-old, so we'll speak to Lord (Teddy) Grimthorpe (owner's racing manager) to see if she runs again this season."
Joseph O'Brien steered Australia to a brilliant success in the Juddmonte International and is due to return to York to partner Venus De Milo in Thursday's Yorkshire Oaks, but the fleeting return to home soil proved worthwhile when Red Rocks Point landed the Ladbrokes Race.
Some frustrating types crossed swords in the Mosscontrol.ie Apprentice Handicap, but 6-4 market leader Henson benefited from Connor King's positive tactics and made all to beat the newcomer Salariaq by three lengths.
Gary Carroll brought Miller Beach with a well-timed challenge to claim the spoils in the Cliffords Groundcare Limited Handicap.
The 6-1 shot was up 5lb for his Naas success earlier in the month, but he proved himself on the upgrade by hitting the front just after the furlong pole and he kept going to account for Amazing Star by half a length.
Galway runner-up Tahaf (5-1) went one better in the Diarmuid Cronin Electrical Handicap, while 7-1 chance Shalaman took the Bet Online At thetote.com Handicap.