Answer: PLAINSONG

AnswerCrossword Clue
PLAINSONGChurch chant
PLAINSONGGregorian chant
PLAINSONGChurch music.
PLAINSONGGregorian chant.
plainsongunmeasured, unaccompanied music sung in unison in ecclesiastical modes from early times
plainsongUnaccompanied church music sung in unison in medieval modes and in free rhythm corresponding to the accentuation of the words, which are taken from the liturgy