Tarana gave weight all round with a determined staying effort in the Ardilaun Hotel Oyster Stakes at Galway.
The John Oxx-trained filly was never far away from the pace in a contest run at what looked a true gallop and was stoked up by Declan McDonogh rounding the bend for home.
Staying on strongly down the straight, the 7-2 chance was two and a quarter lengths too strong for Altesse, who finished well.
Ebeyina, the 2-1 favourite, had every chance three furlongs out and looked a big threat but eventually finished out of the places.
Oxx said: "I'm delighted she won, she is a really genuine filly and she has been running well all year.
"The trainer made a mess of it that last day. I put blinkers on her thinking it would make her better, but she ran too freely and took off and just ran herself into the ground although she still ran well to finish fourth.
"The good strong pace and the uphill finish here suited her and it is nice to win a second Listed race with her.
"There is never too much for them after this race, but she could run in another Listed race, maybe the Finale Stakes at the Curragh in October.
"This was ideal for her and this will be her final year racing.
"She didn't really have a three-year-old career and she had a bit to do this year, but she has now won two Listed races. I thought she might go a bit higher in the ratings, but she didn't quite get there.
"This has been a very lucky race for us."