Answer:

tone

Answer	Crossword Clue
TONE	Answering-machine sound
TONE	Musician's concern
TONE	Sound quality

TONE	The sound of music
TONE	Vocal quality
TONE	Strad feature
TONE	Two-.. (like some cars)
TONE	Muscle quality
TONE	Pitch
TONE	Musical sound
TONE	"I don't like your ..., missy!"

TONE	"Watch your ... with me, mister"
TONE	Tissue firmness
TONE	Color character
TONE	Color quality
TONE	Atmosphere
TONE	Coloration
TONE	Time signal, maybe
TONE	Voice-mail sound

TONE	Manner of speaking
TONE	Mood
TONE	Shade
TONE	Strengthen
TONE	Vocal pitch
TONE	Moderate, with "down"
TONE	... -deaf: musically inept
TONE	Beep, e.g.

TONE	Inflection
TONE	Strengthen, with "up"
TONE	Signal to start talking
TONE	Voice mail message signal
TONE	Voice quality
TONE	Color shade
TONE	Phone message ender
TONE	Signal to begin speaking, perhaps

TONE	What emoticons help convey
TONE	Voice mail cue
TONE	Word after dial or earth
TONE	Work on, as abs
TONE	Musical quality