Running for the first time since a wind operation, Delegate (13-2) travelled nicely throughout before Hughes asked him to go past the pacesetting Derintoher Yank at the third-last fence.
Divine Spear was unable to get close enough to threaten the eight-year-old, who went on to score by seven lengths.
"He'd been travelling well in his races then going out like a light. We gave him a wind op and it's obviously worked," said the Carluke handler.
"It was the first time he'd been working well at home."
Silver Concorde enjoyed a cosy success over the subsequently disqualified The Road Home in a match for the 188bet.co.uk Download The App Novices' Hurdle to win at the track for a third time.
The 10-year-old, who was with Dermot Weld until late in the autumn, won as a 1-6 shot should as he led from the eighth flight and cruised home by five lengths.
"It was good for Silver Concorde as obviously he got beat last time, so this will do his confidence a power of good," said Dalgleish.
The runner-up was thrown out after jockey Derek Fox weighed in 2lb light.
The stewards banned Fox for two days and fined trainer Lucinda Russell £500.
McCain doubled up with Dun Faw Good (4-1 favourite), ridden by his daughter Abbie, in the Champions League Betting At 188Bet Handicap Hurdle.
The well-backed Nendrum (7-4 favourite) won at the track for the second time this season when making all in the Play Betting At 188Bet Novices' Handicap Hurdle.
Jamie Hamilton was positive from the start on the Sandy Thomson-trained nine-year-old, who pulled out more when Charmant looked a danger to gain a three-length verdict, as the conditional rode out his claim.