'concession to reality' is correct and can be used in written English.
For example, you could write, "We had no choice but to make a concession to reality and accept that we couldn't travel this summer."
In part, this was a concession to reality.
He said that the dancers present teased him for making such an ungainly concession to reality.
This is a concession to reality: politicians will always be held accountable for the performance of the NHS.
In a welcome concession to reality, France's president, Nicolas Sarkozy, announced that French banks are now prepared to "voluntarily" extend the maturity of some Greek debt.
But it is Barack Obama who has made the big concession to reality by simply recognising that Cuba is now an independent nation.
But on June 28th Alejandro García Padilla, the governor, made a belated concession to reality by signing a law establishing a de facto bankruptcy regime for state-owned enterprises.
These were not, however, the only concessions to reality that Barbie's designers have felt compelled to make recently.
Although Trump would never admit that he is backtracking, he has been forced to make some concessions to reality.
But if the typical Aston daydream involves Monaco cliffs and illicit rendezvous, the Rapide makes concessions to reality, or reality Aston-style.
The point, however, is that modern conservatism has moved so far to the right that it no longer has room for even small concessions to reality.
Lincoln, during the Civil War, refused to make the mansion a garrison, but made quiet concessions to reality: plain-clothed sentinels patrolled the property.
