Chelsea Rose was a shock 10-1 winner of the Ballyroan Stakes at Leopardstown as she saw off Vinnie Roe and Shalapour.
Con Collins' charge flew at the death in the Listed mile-and-a-half race to deny John Oxx's Shalapour victory by three-quarters of a length, with Vinnie Roe coming home in third.
The victorious three-year-old landed the Moyglare Stud Stakes as a juvenile but had disappointed on her last two runs, finishing ninth in both the Pretty Polly and the Irish Oaks.
However, connections now have their eyes on a crack at the Group Two Blandford Stakes at the Curragh on September 18th.
"She is very tough and genuine and the horses are only now starting to run well," said Collins' daughter Tracey.
"She will now probably run next in a nine-furlong Listed race at the Curragh on September 4 and then go back there for the Blandford."
Johnny Murtagh looks set to miss some high-profile rides after being handed a 21-day ban.
The jockey was called before the stewards having appeared to strike Pat Smullen after passing the post in the opening race at the Dublin track.
Murtagh was aboard sixth-placed Famous Seamus, with Smullen finishing three-quarters of a length ahead in fifth on Dermot Weld's Polished Gem.
The stewards suspended him for improper riding, while he was also severely cautioned over his conduct towards the raceday stewards.
Murtagh's day got worse when he picked up a further two days for careless riding after his victory on Back To Paris in the penultimate race on the card.