Sydney's leading trainer Chris Waller has welcomed his first winner by Brazen Beau, the colt he developed to become a stallion with two Group One wins and a second at Royal Ascot.

Accession, the winner of Saturday's $500,000 Inglis Nursery (1000m) at Randwick, is the second two-year-old winner so far by Brazen Beau, the other being Godolphin's Tassort, the reigning Golden Slipper favourite.

Brazen Beau won the 2014 Coolmore Stud Stakes and beat older horses the following autumn in the Newmarket Handicap before going to England where he was second in the Diamond Jubilee Stakes.

Syndicator Denise Martin paid $300,000 for Accession whose sire stands at Sheikh Mohammed's Darley Stud.

The colt ran second to the sheikh's Aquiri on debut two weeks ago but showed the benefit of that experience when he came from midfield to beat the fast-finishing Strasbourg by three-quarters of a length.

"It was a gun ride from Hugh (Bowman)," Waller said.

"He got him to travel beautifully and he let down well. His first-up run was terrific and it's good to see two-year-olds improve with their runs."

Horses syndicated by Martin are now trained exclusively by Waller who has a reputation for producing his juveniles later in the season.

"It is a good win, especially for Denise," Waller said.

"Our system just proves itself each and every year.

"Denise is a great marketer and needs two-year-old winners otherwise she is banking on Chris saying they need time."

Martin's distinctive purple and white colours have previously been carried to victory in the Golden Slipper by the Gai Waterhouse-trained Sebring in 2005.

Waller would not be drawn on Accession's next race with the colt now assured of a Golden Slipper start in March with more than $300,000 prize money..

"Two-year-olds will tell you where they want to be, and he's got enough for a Slipper anyway" he said.

Bowman said the colt was still learning but showed plenty of race sense.

"He was a bit wayward when he hit the front and didn't quite know how to finish the job," he said.

"But he's a very sensible horse, a real two-year-old type who wants to get on with it."