Custom Cut made it five on the bounce for the bang in-form David O'Meara in the Shadwell Joel Stakes at Newmarket.
The five-year-old has thrived since moving from Ireland to join North Yorkshire handler O'Meara, who has won the Sprint Cup at Haydock and Ayr Gold Cup in recent weeks.
Danny Tudhope dictated matters from the front and always looked in command. Captain Cat threatened briefly as the challengers gathered, but he was done no favours by Cable Bay a furlong out and Custom Cut was going away at the line.
The 15-2 chance won by two and a half lengths, with Hors De Combat in third.
"I think this track suited, he got into a nice relaxed rhythm," said Tudhope. "Two and half out they were coming, but he saved a bit and he wasn't going to lie down
"He's improved all year, David's done a great job and it's fantastic for the team.
"He's versatile ground-wise, Leopardstown was soft, and I held him up that day, too. Possibly there's a Group One in him."
Joint-owner Gary Douglas said: "He's just improved and improved all year and after winning a Listed and a Group Three the idea was to come here and see how good he is.
"He's got a few options now, we need to sit down and discuss them all and if David believes he's up to winning a Group One somewhere, then that is what we'll do.
"He beat Trade Storm at York and he's won a Group One since."
Harry Charlton, trainer Roger Charlton's son, said of Captain Cat: "He hung here in a maiden and it's disappointing that he's done it again.
"The idea was to come back here for the Challenge Stakes, but I think we might have to reconsider that now. His main aim is Dubai."