The Malton trainer, who recently saddled his 1,000th victory, was winning this race for a third successive year.
Dream Walker is owned by Swanland-based Keith Brown, whose colours continue to be carried with distinction by Top Notch Tonto, who was second on Tuesday.
Good ground meant the white-faced horse did not line up in yesterday’s contest, as intended.
Ellison praised winning jockey Chris Hayes, saying: “They started racing from a fair way out and Chris used his head.
“He sat and then got all the breaks. He’s a class jockey.
“This horse had a bad draw on Thursday when fourth, but when he’s here we thought he might as well run.
“We let him out on Friday and he was bucking and kicking, and in great form.
“Five runs ago this horse was on the scrapheap.
“He’d a wind operation that didn’t work, and we said we’d give him one more run with a tongue strap.
“He finished second and has won two good races at home since. He has got more confidence now.”
Ellison also struck at the meeting with Our Kylie on Wednesday.
“We’ve had a great week. Every horse we’ve had here has run great, it’s been a good week,” he added.