Crossword Genius

Internal telephone system (8)

Ross

I believe the answer is:

intercom

(Other definitions for intercom that I've seen before include "Speaker system" , "Communications device" , "Short-range telephone system" , "Means of transmitting messages" , "System of communication often on door" .)

I've seen this clue in The Mirror.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.