Sent off at 13/2, the Selkirk raider made virtually all the running to slam 6/4 favourite First Account by thirteen lengths.
The Borders jockey, who was sidelined for three weeks with a dislocated shoulder, said afterwards: “It was horses like him that I was looking forward to when I was undergoing my rehabilitation at Jack Berry House.
“It was a good performance and the first time he has won at three miles.”
Drumbear impressed on his debut over timber in the Betway Maiden Hurdle for Irish trainer John McConnell to give his pilot Simon Torrens a first course success.
Hearts reach a decision on Jacob Davenport contract
Edinburgh's Tynecastle Stadium: Here are 20 pictures from the 1950s and 1960s showing how much the Hearts ground has changed
Former Hibs star Leigh Griffiths finally finds new club as striker set for foreign adventure
Martin Boyle aims to see out rest of his career at Easter Road after stunning Hibs return
Lawrence Shankland reflects on partnership with Barrie McKay, missed chances and Martin Boyle stealing his thunder
“He’s a big horse we have always liked and is a staying chasing in the making,” McConnell said.
“When he learns to drops the bit and settle he will be even better but he will remain over hurdles this season.”
Charlotte Jones, enjoying her best-ever season, also opened her Musselburgh account when steering The Steward to victory for Jimmy Moffatt in the Betway Handicap Hurdle.
Conner McCann was taken to hospital for x-rays on an injured arm after he was unseated when his mount Gemologist was badly hampered at the fifth flight in the same race.