Answer: comein

AnswerCrossword Clue
COMEINResponse to a rapper, perhaps
COMEIN"The door's open"
COMEINEnter the premises
COMEIN"Enter!"
COMEINEnter.
COMEINAnswer to a knock.
COMEINReply to a knock
COMEINInvitation at the door
COMEINResponse to a knock, maybe
COMEIN"Enter"
COMEINReply to a ring
COMEINCry from behind a door