'left a part' is correct and usable in written English.
You can use it when you are describing something that has been partially completed or something that is missing an element. For example, "She left a part of the job unfinished."
Many more have left a part of themselves on the battlefield, or brought the shadows of battle back home.
Clear Channel, the radio giant, left a part of itself on the public markets, and its shares have fallen significantly since its leveraged buyout.
New York's Conservative Party, for instance, exists to punish Republicans for drifting too far left — a part it played to perfection by supporting Hoffmann's candidacy.
Pick: Falcons Titans (1-2) aTexansns (3-0) Sunday, 1 p.m. Line: Texans by 12 Matt Shaub, the Texans quarterback, left a part of himself on the field last week.
When I went over the wall, I felt as if I'd left a part of me behind," Yasir, a law student who was shot in the foot that day, said.
But before the snake died yesterday, it left a part of itself behind: an orphaned egg.
"We leave a part of the budget for remediation," Mr. Ackerman said.
Michael S. Clendenin, a spokesman for Consolidated Edison, said that lightning had apparently struck the 4,000-volt 4,000-voltving a part stripped and dangling.
Many small businesses leave a part of their tax refund on the table because calculating the deduction amount is ridiculously complicated.
Unless the vehicle involved in a crime leaves a part bearing its identification number at the scene, the evidence is unlikely to lead investigators to a specific car.
In some African countries, when you order a robe, the tailor leaves a part undone so the buyer can finish it, make it his own".
