"I regret to tell you...” (4)

I believe the answer is:

alas

(Other definitions for alas that I've seen before include "Lackaday" , "Regrettably, unfortunately" , "express regret thus" , "Oh dear!" , "Cry of grief" .)

I've seen this clue in The Wall Street Journal.

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.