Melbourne's premier trainer Darren Weir has waited a long time to celebrate his first Group One win in Victoria.

And, at Caulfield on Sunday, he was forced to wait just a little bit longer before Trust In A Gust was confirmed the winner of the Sir Rupert Clarke Charity Cup.

Weir and a bunch of excited owners and stable staff celebrated the spirited victory of four-year-old Trust In A Gust ($6) who kicked back on the line to defeat multiple Group One winner Dissident ($6.50) by a short half-head in the 1400m sprint.

But Weir and jockey Damian Lane, who claimed his maiden Group One, had to put celebrations on hold as the jockey of the runner-up Ben Melham fired in a protest alleging interference early in the race.

Melham claimed Lane had crossed him without being clear and took his running which forced him to ease for four or five strides under his big weight of 58kg.

Lane and Weir were adamant the incident had no bearing on the result and that another runner had dictated Lane's line.

Stewards dismissed the objection and agreed both horses had their chances.

Weir, who claimed his first Melbourne premiership last season and had won four Group One races in South Australia, said his win at the elite level in Melbourne had been a long time coming.

I've had a heap of placings. It's great to get the monkey off the back," Weir said.

"It's a great thrill for me to get one finally in Victoria. And to do it with this little horse is great.

"He got headed and fought back and just stuck his head out at the right time.

"He's a great little trier."

Trust In A Gust settled close to the speed set by Sistine Demon and hit the front early in the straight.

Dissident was giving weight to all his rivals including 6kg to the winner but emerged and hit the front inside the final 50m before Trust In A Gust rallied.

Bull Point ($10) came in another 1-3/4 lengths away third.

The win was also special for 20-year-old Lane who hails from Western Australia but has been based in Melbourne for three years.

"It's a great relief," he said of his first Group One.

Dissident was brave in defeat as he chased his third Group One in a row.

"He hit the front before the post but just the weight difference was telling," Melham said.