Shinn had no preconceived ideas and said the horse felt good from the outset. "He travelled like the winner a long way out.
"I kept him out of trouble on the fresh ground and he did the rest."
The race was without one of the favourites when Shoot Out was withdrawn because of the track downgrade to a heavy 9.
His Chris Waller-trained stablemates filled the minor placings ahead of future Group One assignments.
"It was a great run by Danleigh and he will go to the Chipping Norton," Waller said.
"Kelinni [fifth] and Gatewood [sixth] will also go there along with Shoot Out."
The win capped a big day for Shinn who returned to riding on Friday after an extended break forced on him after he collapsed at Gosford in January.
He satisfied doctors he was ready to return and tuned up for the Apollo with victory on the promising Jacquinot Bay.
"It's a great way to kick-start the autumn," Shinn said.
"It gives me a lot of self satisfaction.
"There's a big autumn ahead and this is a big stepping stone."
-AAP