The term MCFLY PORTRAYER is referring to the actor who played the character Marty McFly in the 1985 movie Back to the Future. The crossword solution for this term is FOX, which is the last name of the actor Christopher Lloyd who portrayed the character. Christopher Lloyd is an American actor who has been in many films and television shows, but he is best known for his role as Marty McFly in the Back to the Future trilogy.