Hitchens repeated his Weatherbys Greenlands Stakes win of two years ago under a fine ride from Johnny Murtagh at the Curragh.
Trained in North Yorkshire by David Barron, the eight-year-old got a nice tow into the race as Leitir Mor set just a reasonable gallop on the rail.
The leader gave way a furlong out and Murtagh's mount (13-2) showed a nice turn of foot to put the Group Three event to bed, scoring by a neck from Reply.
Murtagh said: "He quickened through well, I thought he was always going to win. The owners were very happy with him today, they said he was in good form.
"He didn't like Newmarket (seventh in a handicap last time out), coming down the hill there and the firm ground didn't suit him. The ground is lovely today, though."