As a noun: a special dispatch or a person sent on a special assignment (special envoy). As a verb (suru): to send or dispatch someone specially for a particular purpose.
政府は緊急交渉のために特派を決定した。
The government decided on a special dispatch for emergency negotiations.
社は南米支局に記者を特派した。
The company dispatched a reporter to its South American bureau.
彼は国際会議への特派として選ばれた。
He was chosen as a special envoy to the international conference.