The phrase "a single thing in" is correct and usable in written English.
It can be used when referring to one specific item or concept within a larger context or group.
Example: "There isn't a single thing in this report that I agree with."
Alternatives: "one item in" or "a solitary aspect in".
"I don't know of a single thing in our report that should not be public after ten years," Kean said.
The maid's lawyer, Kenneth Thompson, insists that "she has never once changed a single thing" in her story of the sexual assault.
Beyond color of fur, he had not a single thing in common with the future chic and shiny size-zero ABC heiress Mimi Goldsparkle.
I don't believe we have a consensus on a single thing in migration," said Demetrios G. Papademetriou, the Migration Policy Institute's president.
"That's the first time I've seen a police officer do a single thing in three and a half years," she said.
"American businesses win increased market access to Russia without giving up a single thing in return — no tariff changes, no market concessions, nothing," Senator Max Baucus, the Montana Democrat who heads the Finance Committee, said in a statement.
We have forgotten that treatment matters more than any single thing in a desperately ill person's life.
Melanie Johnson insists that she can't think of a single thing - in 10 years! - and looks disbelieving when I tell her that others have.
But just as important was the steering of sounds to present the symphony as a single thing, developing in response to forces inherent within it.
If there is a single thing going on in the world today from the Middle East to New York to Greece is a lost in trust in our institutions especially government and regulatory institutions.
"I don't own a single thing that was in my life from before the year 1983.
