Answer: yacks

AnswerCrossword Clue
YACKSChatters endlessly
YACKSShoots the breeze
YACKSTalks and talks
YACKSTalks and then some
yacksa large long-haired wild or domesticated ox (Bos grunniens syn. B. mutus) of Tibet and adjacent elevated parts of central Asia
yacksYACK, to talk persistently