Answer: duet

AnswerCrossword Clue
DUETTune for two
DUETEverly Brothers hit, e.g.
DUETMany a Streisand hit
DUET"Say, Say, Say," say
DUETAny Donny and Marie song, say
DUETRighteous Brothers song, e.g.
DUETSteve and Eydie number
DUET"I Got You Babe" is one
DUETComposition for two
DUETHarmonized number
DUETTwosome
DUETCollaberative number
DUET"Tea for Two" for two, e.g.
DUETPiano piece with "primo" and "secondo" parts, e.g.
DUETPiece marked "piano, four hands," obviously
DUETSonny and Cher song, e.g.
DUETSonny and Cher, e.g.
DUET"Cinque, dieci, venti, trenta" in "The Marriage of Figaro," e.g.
DUETIndigo Girls song, e.g.
DUETTune two croon
dueta composition for two performers
DUETTrio down one
DUETPerforming pair
DUETOperatic love scene
DUETFour-handed work
DUET"I Got You Babe" or "Summer Nights," e.g.
DUETKaraoke tune for two
DUETKaraoke option
DUETSimon and Garfunkel song
DUETTuneful twosome
DUETPartnership song
DUETMusic for two
DUETNumber one can't do
DUETPiece for a pair
DUETAir for a pair
DUETAir for two
DUETNumber for two
DUETSong for two
DUETIt takes two
DUET"It Takes Two" is one, appropriately