Victorian three-year-old Vow And Declare avenged his Queensland Derby defeat with a commanding win against the older horses in Saturday's Group 3 Tattersall's Cup (3000m) at Eagle Farm.

Danny O'Brien's stayer travelled comfortably throughout the race before being asked to quicken inside the final 500m, at which point he raced away to put more than three lengths on runner-up Big Duke.

Jockey Glen Boss, who wasn't aboard the son of Declaration Of War when he finished second to Mr Quickie in the Derby earlier in the month, said his first impression of the gelding was that he could measure up to a stronger calibre of staying race in the spring.

"He (Danny O'Brien) has a massive opinion of him, he was dirty he got beaten in the Derby when things didn't go right, but it's worked out alright because he wouldn't have run today," Boss told Racing Queensland.

"I think he’s got plans for him in the spring and I can see why, but it's always hard to judge where these horses are at because that was very soft."

Part-owner Geoff Corrigan is living every owner's dream and hoping Vow And Declare can make the necessary progress to run in the Melbourne Cup.

"We needed to see whether he's a good stayer because there's a couple of good 3200m races in the spring," Corrigan said.

"When he won on Oaks day at Flemington last November Danny's description of him was 'this is an elite staying prospect' and it's always stayed with me.

"He won over 1800 metres which was an unsuitable trip but he did that on guts then he injured his back a bit which put him out for a while but he's shown today that he is an elite staying prospect."

After opening at $101, Vow And Declare is now rated a $67 chance for the Melbourne Cup with BetEasy.

Pic by Trackside Photography, to view website click here

Story by Racing.com's James Tzaferis & AAP