Jody Townend sends Klarc Kent home© Photo Healy Racing
Willie Mullins doubled up at Clonmel in the bumper but not with the horse the market expected.
His newcomer, High City Roller had Patrick Mullins on board and went off 6/5 favourite, however, the pair finished completely tailed off.
Jody Townend was booked for Klarc Kent who was 10/3 on the back of a third at Fairyhouse and a fourth in Navan.
Klarc Kent raced three wide in contention off the home bend as Golden De Coeur led narrowly on the inner from Telecon
Golden De Coeur cracked first approaching the final quarter of a mile as Klarc Kent soon took over from Telecon.
Klarc Kent (10/3) kept on well in the final furlong from a keeping-on Suain Na Draoicht (11/1 - 11/2). There was four a quarter lengths between the pair at the winning post. Telecon (16/1) dropped 12 lengths back to third.
Mullins said: "It was a pleasant surprise as I was hoping he'd run well but didn't think he'd win.
"It must be very dead and tacky ground as he had the strength to gallop through it and Jody said if something came to him, he'd have galloped on again. He just kept galloping in the ground and extra two furlongs made a big difference to him.
"We'll probably give him a spin in a winners' bumper and he is a real winter jump horse for next season.
"It is Colm's (O'Connell, whose father owned Un De Sceaux) first winner in his own name. This is his first horse and Tolic, who used to ride Un De Sceaux, led him up so I'm delighted.
"I don't know what happened High City Roller (beaten favourite) yet but maybe with his pedigree, the ground mightn't have suited. There could be more than that because he was never going but we'll have another day."
Additional reporting by Tom Weekes