Henry de Bromhead is better known for his exploits at the Cheltenham and Punchestown Festivals, but he showed his versatility when winning his first Group race on the level as Minaun caused a surprise in the Marble Hill Stakes at Cork.
Only four went to post in the Group Three and one of those, Ger Lyons' Shalaalaa, became very upset in the stalls, compromising his chance.
Aidan O'Brien's Military Style, a winner on debut, was sent off the 4-9 favourite to remain unbeaten but he could only finish third.
It was left to Minaun (9-1) and Paddy Twomey's Arctician to fight out the finish, with Chris Hayes' mount coming out on top by a neck.
It was a profitable day for Hayes who also won aboard Miss Amulet (5-2), Starlite Dancer (15-2) and Too Soon To Panic (9-4).
"I'm delighted with her, we've always really liked her and she is a lovely filly. Cormac Farrell recommended her for us back in March," said De Bromhead.
"I'm delighted for her owner Steve McCarthy and it is his and my first Group winner on the Flat. He previously had Aerclub (sold to Hong Kong) with us and we replaced him with this lady and she looks an able deputy.
"Hopefully she will keep progressing and Chris really liked her. She will definitely stay further.
"She has a Moyglare entry and is growing and maturing all the time so we won't be in a mad panic to go anywhere."
Twomey did not have to wait long for compensation as Sonaiyla (12-1) won on her first start for the yard in the Irish Stallion Farms EBF Sweet Mimosa Stakes.
Bought for €110,000 out of Mick Halford's yard, she is from a good Aga Khan family and is now a valuable proposition with a Listed win on her record.
Snow, a full-sister to Kew Gardens, looks another improving filly for O'Brien after relishing the step up in trip to win the Munster Oaks.
At Fairyhouse, Shane Crosse excelled once again on Joseph O'Brien's Speak In Colours (11-8 favourite) in the Rybo Ballycorus Stakes.