Possible Clues:

• Clean "This Is How We Party" band?
• Cake in a tub?
• You can get this in bars?
• Thus Father is up for this sort of opera
• Daily tearjerker
• Sudsy TV show?
• Daytime story
• The end of each of 20- and 56-Across and 11- and 29-Down is a popular one
• Bar on a bathroom sink
• Stuff in a bar