Guthrie who sang “Alice’s Restaurant”

ARLO

This folk singer is the son of Woody Guthrie and known for his storytelling songs, including a famous 18-minute Thanksgiving anthem.

This clue refers to Arlo Guthrie, the folk singer famous for his 1967 song "Alice’s Restaurant Massacree." The song is a satirical talking blues about a Thanksgiving incident and the Vietnam draft, making Guthrie a well-known figure in American folk music. Since the clue gives his last name and the song title, the answer is simply his first name, "ARLO.