Possible Clues:

• "Wot's dat over ___?"
• In dat place
• __ 23, a 13/21A running north from York to Scotland
• 'Dat ___' (classic jazz song)
• Comic Marty Allen's signature greeting, "Hello, ___!"
• Where dat thing goes, in Brooklyn
• Marty Allen's signature greeting, "Hello ___!"
• 'Ta-Ra-Ra-Boom- --'
• 'Dat ___' (jazz tune)
• 'Hello ___' (old comedy intro)