(24A. Toothpaste that Bucky Beaver once pitched) ; LAIRD (55A. Melvin of the Nixon cabinet); LANKY (37D. Long and lean); LEICA (36D. German binoculars maker); LEVIN (31D. Ira who wrote “Rosemary’s Baby” ); REHAB (38A. Habit-kicking program); 8D. “Delphine” author Madame de STAEL ; V-NECK (47A. Pullover style). Short stuff --