Related Clues:

• Square one?
• Social greenhorn
• Filmdom's Napoleon Dynamite, for one
• With 77-Across, when combined into one word, national trivia championship, e.g
• Many a comic book collector
• Revenge getter of film
• One whose favorite website is Sporcle, say
• '___ alert!'
• "___ alert!"
• Matthau's "I.Q." role
• "The Big Bang Theory" type
• In Munich, a mug of beer, one with a sharp head?
• Geek, anorak (sl.)
• German-born physicist
• Father of Relativity