The phrase "a specific mission" is correct and usable in written English.
It can be used when referring to a clearly defined task or objective that someone is expected to accomplish.
Example: "The team was assigned a specific mission to improve the company's online presence within three months."
Alternatives: "a particular objective" or "a defined task."
It wasn't about a specific mission or an enemy target.
"It is a court without a mandate, without a specific mission.
The man who all but killed me was a member of a disciplined organization with a specific mission.
"We started CMEE with a specific mission, to celebrate the community we live in," said Ava Locks Davis, the director of exhibits.
Unlike the Y, Makor has a specific mission: to attract people in their 20's and 30's to events that will teach them about Jewish culture.
Only then may an individual be assigned to a specific mission, with one or more additional years of training required before launch.
So this 450 figure from Bratton is presumably meant to be a compromise: fewer cops, with a more specific mission.
Though often cast as a free-floating information guru, Mr. Tufte has a highly specific mission: on March 5, he was appointed by President Obama to a panel to advise the Recovery Accountability and Transparency Board, which monitors the way the $787 billion in the stimulus package is being spent.
Instead of Mr. Bush's vague talk of representative democracy in Afghanistan, he defined a more specific mission.
The ballet troupe, like the school, has a very specific mission, one that is not particularly of our time: "the revival of small masterworks by great choreographers," and presenting "innovative hour-long ballets based on children's literature".
Congress created Fannie Mae as the Federal National Mortgage Association during the Great Depression with a very specific mission: Enhance the availability of mortgage credit.
