The eight-year-old had to be put down after breaking a hind leg. Ripon clerk of the course James Hutchinson confirmed the news.
The winner of 10 of his 54 races, Jim Goldie's charge was a Group Three scorer and finished second to Slade Power on Champions Day at Ascot in 2013.
Teruntum Star returned to winning ways for Kevin Ryan in the consolation event for the Great St Wilfrid later on the card.
Back to form last time out out York, Ryan's representative went clear a furlong out under Kevin Stott but his supporters were made to sweat.
Red Pike made a late bid but failed by a neck. Magical Effect and Guishan took minor honours.
"He's had a few little niggles in his career but he's always been a good horse," said Ryan.
"It will be Ayr next, for either the Gold or Silver Cup, and he might even go straight there.
"He just doesn't like fast ground so he can only run when there's enough give, but he's very good on his day."