Answer:

chatterbox

Answer	Crossword Clue
CHATTERBOX	Big talker
CHATTERBOX	Magpie
CHATTERBOX	Motor-mouth

CHATTERBOX	Gabber
CHATTERBOX	Motormouth
CHATTERBOX	Magpie, e.g.
CHATTERBOX	A woman of a few thousand words.
CHATTERBOX	Nonstop talker.
CHATTERBOX	Gabby one
CHATTERBOX	Nonstop talker
CHATTERBOX	MAGPIE

CHATTERBOX	Yakker
CHATTERBOX	Motor mouth
CHATTERBOX	Foolishly loquacious talker
CHATTERBOX	One who never stops talking
CHATTERBOX	Party guest who won't shut up
CHATTERBOX	One talking on and on and on