Possible Clues:

• Intro to "mio"
• “___ Mio”
• With 45-Across, song on which Elvis's "It's Now or Never" was based
• ''___ mio'' (Enrico Caruso hit)
• Words sung before ''mio''
• Start of a Neapolitan lament
• With 118 Down, an Italian refrain
• '-- Mio' (hit Italian tune)
• With 12-Down, classic Neapolitan tune
• '___ Mio' (tenor standard)