Answer:

chants

Answer	Crossword Clue
CHANTS	Vocalizes
CHANTS	Some crowd cheers
CHANTS	"USA! USA!" and others

CHANTS	Some are Gregorian
CHANTS	Monotonous songs
CHANTS	Intonations
CHANTS	Monks' monotones
CHANTS	Gregorian songs
CHANTS	Crowd shouts
CHANTS	Protesters' shouts
CHANTS	Repetitive cries

CHANTS	Spectators' shouts
CHANTS	Recites musically.
CHANTS	Plain songs.
CHANTS	Songs.
CHANTS	Musical compositions.
CHANTS	Emulates a muezzin
CHANTS	Intones
CHANTS	Parts of some religious observances

CHANTS	Protesters' cries
CHANTS	Some psalms
CHANTS	Demonstration noise
CHANTS	"Dee-fense! Dee-fense!" and others
CHANTS	Monastery music
CHANTS	Staples of protests
CHANTS	Protesters' cries, often
CHANTS	Gregorian recitations

CHANTS	Monk-y business?