Answer: acappella

AnswerCrossword Clue
ACAPPELLA

Without instruments

ACAPPELLA

Without instruments (8)

ACAPPELLA

Unaccompanied, perhaps

ACAPPELLA
Unaccompanied singing style
ACAPPELLA
Singing without instruments
ACAPPELLALike some choral performances
ACAPPELLAWithout accompaniment, as choral singing.
ACAPPELLAUnaccompanied, as a choir.
ACAPPELLALike singing in a shower
ACAPPELLAHow Pentatonix sings
ACAPPELLABarbershop-like
ACAPPELLALacking backing