Answer: babbler

AnswerCrossword Clue
BABBLERChatterbox
BABBLERIncoherent one
babblerreveal by talk that is too free
babblerto talk enthusiastically or excessively
babblerutter in an incoherently or meaninglessly repetitious manner
babblermake sounds as though babbling
babblerutter meaningless or unintelligible sounds
babblerone who babbles (to talk incessantly)