Related Clues:

• Diva's moment
• ''Un bel di,'' for one
• ''Toreador Song,'' e.g.
• Berg's 'Der Wein,' e.g.
• 'You're Still the ___' (1998 Grammy winner)
• Washington bill
• Opening number
• Part of a libretto
• Lunch hour, maybe
• Only partner
• Beatles' compilation
• An air from ''Aida''
• Lonely number
• ''--- if by land...''
• Pons song