Implied, though not expressed (5)

I believe the answer is:

tacit

(Other definitions for tacit that I've seen before include "Implicit, unspoken" , "Aircraft engine casing" , "without speaking" , "Silently understood" , "Silent - understood" .)

I've seen this clue in The Guardian.

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.