Crossword Genius

Narrow inlet of the sea (5)

Ross

I think it could be either:

sound

firth

(Other definitions for sound that I've seen before include "note, for instance" , "Not diseased or damaged - listen" , "Financially stable" , "Unimpaired" , "to do the plumbing?" .)

I've seen this clue in The Times and The Telegraph.
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.