Possible Clues:

• Classic parlor game
• Quiz score?
• Good game for a long ride
• 'Which weighs more - a pound of feathers or a pound of lead?' and others
• Classic 1940s-'50s quiz show
• Radio, TV and parlor game
• Game suggested by the first words of 17-, 25- and 42-Across
• TV quiz show of yore
• Early TV quiz show