His first appearance in Group company brought a further step forward. Dylan Browne McMonagle allowed Defiantly to stride to the front and establish an even rhythm through the early stages. The pace was gradually lifted from some way out, stretching the field before the turn for home, and the leader continued to travel with composure as his rivals began to come under pressure.
Asked to lengthen in the straight, Defiantly responded generously and drew away to defeat Santorini Star by five and a half lengths, with dual Kergolay winner Double Major another five lengths behind in third.
"He's a solid horse and has improved with every run," McMonagle told Sky Sports Racing.
"He's a strong stayer, he doesn't do too much and he's always behind the bridle which helps over this trip. Every question you ask him, he responds good.
"There doesn't seem to be a bottom to him, he continues to stay. He's a solid candidate for the Melbourne Cup and handles the fast ground. He's got all the right qualities for it."
There is a further Australian connection in the pedigree. Defiantly is a half-brother to Group 1 Underwood Stakes (1800m) winner Buckaroo and to Middle Earth, who finished third in the 2025 Group 1 Lexus Melbourne Cup behind Half Yours.