"I was happy after her run in the Silver Slipper on a wet track from a wide alley."
James McDonald had Romantic Moon just behind the pace while the well-backed favourite, Assail ($1.85), was back in the field after a slow start.
Romantic Moon had the drop on the leaders and strode forward under confident riding from McDonald to beat Thump ($26) by a length.
Assail couldn't get clear running and failed to run on, finishing sixth, six lengths from the winner. In contrast to O'Shea, Assail's trainer Clarry Conners was scratching his head after the filly's performance.
Assail was the raging favourite for the Magic Millions in January but was a race morning scratching with a deep-seated foot abscess which Conners thought had come good.
"I'm disappointed," he said. "She was disappointing.She stood there flat footed and then didn't go on.
"I've had a quick look at her foot and it seems fine."
- AAP