The phrase "about the concession" is correct and usable in written English.
It can be used when discussing a specific concession or compromise made in a negotiation or agreement.
Example: "The terms of the agreement were clear, but there was still some ambiguity about the concession that had been offered."
Alternatives: "regarding the concession" or "concerning the concession".
The Tory leadership was profoundly uneasy about the concession.
Within 10 minutes, Lennon was more concerned about the concession of a United goal.
When I asked about the concession, he said, "The opposition calls it a surrendering of national sovereignty, but investors need security for their investment.
MoviePass's value proposition needs to be as much about the concession revenue it's delivering to theater owners as it is about letting subscribers see many movies for a fixed monthly price.
And across the country, deeply conservative organizations angry about the concession on tax increases are pledging more, not fewer, primary challenges to Republicans they believe are straying too far from the party's orthodoxy on taxes, guns, energy, immigration, spending and abortion.
She felt terrible about the concessions.
Students: Tell us about the concessions you've made to fashion, style or beauty, at any point in your life.
Even before that showdown, there will be questions about the concessions that his negotiators made to reach this deal.
But today these pluralist ideals are spread more widely: Liberal Democrat members nationwide seem strikingly grown-up about the concessions their party must make in coalition government.
Many Euro-enthusiasts were angry about the concessions handed to Britain and other troublemakers at the summit to win their support for a new treaty to replace the defunct constitution.
While Hamas officials have been boasting about the concessions they say they have exacted from Israel, Israeli officials say nothing has been agreed upon beyond the immediate cessation of hostilities.
