Answer: quack

AnswerCrossword Clue
QUACKBird's cry.
quackto utter a quack
quackthe harsh cry of a duck
quackfraudulent pretender to medical or other skill
quackto make the sound of a duck
QUACKPhony doc
QUACKSound from the pond
QUACKDubious doctor
QUACKMalpractice suit target
QUACKDucky declaration
QUACKMock doc
QUACKMalpractice target
QUACKMedicaster
QUACKBird sound.
QUACKSnake oil salesman
QUACK"Doctor" with a fake diploma.
QUACKNostrum purveyor
QUACKDuck sound
QUACKPhony physician
QUACKFarmyard sound
QUACKDucky comment
QUACKCharlatan
QUACKMountebank
QUACKDo like Donald
QUACKDoc who's a crock
QUACKUnlicensed physician
QUACKDisreputable doctor