Related Clues:

• B'way smash letters
• Sign for a sellout
• Full-house indication
• Good sign for producers
• Hit-show sign
• Overflow letters
• Sign of a hit show
• Hit initials
• Sellout letters
• Hit show abbr.
• Sold-out theater letters
• 'No seats' letters
• Sign scalpers adore
• Packed, in a way: abbr.
• Sold-out sign abbr.