Answer: droner

AnswerCrossword Clue
DRONERYawn-inducing speaker
dronerdeep humming sound
dronerto make a deep humming sound
dronerto speak in a dull, monotonous tone
dronerone that drones (to make a monotonous humming sound)
DRONEROne buzzing
DRONEROne humming
DRONEROne talking in a monotone voice
DRONEROne who goes on and on
DRONERBoring speaker, say
DRONERA Johnny One-Note
DRONERMonotonous talker
DRONERBee.
DRONERMonotonist.
DRONERMonotonous speaker.
DRONEROne who speaks monotonously
DRONERBoring speaker
DRONERDull lecturer