BOSTON — Longtime Boston television personality and entertainer Frank Avruch, who was the star of the popular children's TV program "Bozo the Clown," has died. He was 89.Avruch died Tuesday at his Boston home from heart disease, his family said in a statement to WCVB-TV .Avruch played Bozo the Clown from 1959 to 1970, a clown character particularly popular in the U.S.