The term Lassie Portrayer is referring to the actor who played the role of Lassie in the popular film series. The crossword solution for this term is PAL, which stands for the actor PAL, or Peter, Lawford. Peter Lawford was an English actor who was best known for his roles in films such as Ocean's 11 and The Picture of Dorian Gray. He also starred as Lassie in the original Lassie Come Home film in 1943.