In an undertone ( Italian ) (5,4)

I believe the answer is:

sotto voce

(Other definitions for sotto voce that I've seen before include "In an undertone, from Italian" , "on the quiet" , "(Said) quietly" , "Speaking quietly" , "In an undertone from Italy" .)

I've seen this clue in The Independent.

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.