Clon Coulis provided trainer David Barron with his first winner at Ascot in more than 12 years after coming from last to first to land the Markerstudy British EBF Valiant Stakes.
Having claimed a Listed success at Pontefract last time out, the four-year-old struck at the same level, despite veering left late on in the mile contest.
Moving smartly into contention the 4-1 shot was driven to the front inside the final furlong, before holding Di Fede by a neck.
North Yorkshire-based Barron said: “That was all right, I’ll have to come back!
“I’ve been second in a couple of Wokinghams and second in a Hunt Cup. Could I train a winner here? Could I hell.
“He (Ben Curtis) thought she was going to come and she caught him a little unaware, but it worked out well in the end.
“She won very well at Pontefract. She came from further back at Pontefract than she was here and at the line she was two and three-quarter lengths clear. I thought that was a good performance.
“I think we will look at a Group Three, as that seems the obvious route to go.”