Duos divided in two?

• Some flights
• Concert features
• Arias, e.g.
• Flies in a way
• Flight school feats
• Goes off on one's own
• ''American Idol'' numbers
• Star's times to shine
• Tunes for one

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Solo \So"lo\ (s[=o]"l[-o]), n.; pl. E. Solos (s[=o]"l[=o]z), It. Soli . [It., from L. solus alone. See Sole , a.] (Mus.) A tune, air, strain, or a whole piece, played by a single person on an instrument, or sung by a single voice.