A first-up shot at a Group One victory remains the target for Commanding Jewel despite the mare being beaten in a barrier trial at Cranbourne.

Commanding Jewel has not raced since September and is on the comeback trail from a foot injury sustained in a paddock accident.

The four-year-old Group One winner and three-quarter sister to Atlantic Jewel stepped out in an 1190m trial on Monday and was beaten 1-1/2 lengths by city winner Use The Lot.

"I'm pleased with her at this stage," trainer Leon Corstens said.

"The track was a slow seven so she was found wanting a bit the last half a furlong (100m).

"She just raced a bit keen and fresh early."

Commanding Jewel won a jump-out at Seymour earlier this month.

Corstens now plans to give the mare an exhibition gallop in the coming weeks to boost her fitness ahead of the final Group One race of the Australian season, the Tatt's Tiara (1400m) on June 21 at Eagle Farm.

"I'll see how she pulls up and at this stage it's full steam ahead," Corstens said.

"I've still got a bit of time up my sleeve so hopefully I can take her to the races and work her between races, maybe with another horse, and hopefully that will get her fit enough."

Damien Oliver, who has ridden Commanding Jewel in four of her seven starts including her 2012 Thousand Guineas triumph, rode the mare in the trial.

"Damien said she just pulled up a little bit on the big side and trialled a bit fresh," Corstens said.

"He said she got quite keen early and wilted a bit at the finish."

Commanding Jewel's latest injury came after her win in the Group Two Let's Elope Stakes in September.