Answer:

ONKEY

Answer	Crossword Clue
ONKEY	Harmonious, as singing
ONKEY	Singing accurately
ONKEY	Not flat

ONKEY	Pitch-perfect
ONKEY	Well pitched
ONKEY	Harmonizing with the group
ONKEY	Best way to sing
ONKEY	Well-pitched
ONKEY	Not sharp, say
ONKEY	Pitched perfectly
ONKEY	Properly pitched

ONKEY	Good way to sing
ONKEY	Neither flat nor sharp
ONKEY	Not flat or sharp
ONKEY	Pitched properly
ONKEY	In tune
ONKEY	Well-pitched?
ONKEY	Not sharp at all
ONKEY	Like music to one's ears?

ONKEY	Not sour
ONKEY	Hitting the right notes
ONKEY	Neither sharp nor flat
ONKEY	True, as a tuba
ONKEY	Musically accurate
ONKEY	Perfectly pitched
ONKEY	Not sharp or flat
ONKEY	Musically correct

ONKEY	Musically precise
ONKEY	Pitched right
ONKEY	In tune.
ONKEY	Attuned.
ONKEY	Correctly sung
ONKEY	Pleasing to the ear
ONKEY	How to sing, ideally
ONKEY	Like a good singer

ONKEY	Not flat, say
ONKEY	Perfectly pitched, musically
ONKEY	Not at all sharp, maybe
ONKEY	Pleasant to the ear, say
ONKEY	How singers should sing