Former N.B.A. star who has unofficially served as a peace ambassador with North Korea Crossword Clue

 Yes, the former NBA star who has unofficially served as a peace ambassador with North Korea is Dennis Rodman. 

Rodman first visited North Korea in 2013 and has since made several trips to the country. He has met with North Korean leader Kim Jong-un and has been praised by the North Korean government for his efforts to promote peace.

Rodman's visits to North Korea have been controversial, and he has been criticized by some for legitimizing the North Korean government. However, Rodman has defended his actions, saying that he is trying to build bridges between the two countries.

It is unclear what impact Rodman's visits to North Korea have had on the country's policies. However, he has certainly raised awareness of the issue of North Korea and has opened up a dialogue between the country and the United States.