The phrase "a concession on a" is not complete and lacks context, making it difficult to assess its correctness in written English.
It could be used in contexts discussing agreements, negotiations, or compromises, but it needs to be followed by additional information to clarify its meaning.
Example: "The negotiations resulted in a concession on a key issue that both parties had been debating."
Alternatives: "an agreement on a" or "a compromise regarding a".
The respondents were presented with a proposal that would require their side to make a concession on a key issue in exchange for lasting peace in the region.
You may also be able to trade a concession on a relatively symbolic issue for a concession from your counterpart on an issue you value more.
Thus if you are providing an exemption or a concession on a tax, it will inherently favour more those whose incomes mean they would normally pay higher tax rates.
Braathens SAFE applied for a concession on a route from Norway to New York on 27 March 1950.
This knowledge will allow you to identify potential tradeoffs: if there's an issue you don't feel strongly about, you might be willing to concede in exchange for a concession on an issue you value greatly.
If one member cares more about what movie they see, and the other cares more about where they have dinner, each can make concessions on an issue of low value in exchange for a concession on an issue he or he values more.
Then propose making a concession on that issue in exchange for a concession from her on an issue you value highly.
A DWP spokeperson denied a concession on child maintenance would be offered.
President Nicolas Sarkozy of France made a concession on Thursday by offering to adopt a weaker version of Germany's law committing to a balanced budget.
They complain that La Marina, a concession on city parkland initially billed as a restaurant-lounge, has evolved into a raucous outdoor nightclub, attracting the likes of Jay-Z and Leonardo DiCaprio.
The reasons for its obduracy are presumably that it saw a concession on this issue as a precedent for other compromises in the future which it would not wish to make.
