Clark —, Best Actor in a Leading Role Oscar winner for It Happened One Night (5)
I believe the answer is:
gable
(Other definitions for gable that I've seen before include "Side of house or Clark, film star" , "Triangular part of a wall supporting a ridged roof" , "Part of wall in angle of pitched roof" , "Triangular upper part of a wall under a roof" , "Part of side wall between roofs" .)