Clicking sound? (3)

I believe the answer is:

aha

(Other definitions for aha that I've seen before include "Triumphant cry" , "Cry of surprise" , "Bingo" , "it expresses surprise" , "Exclamation of discovery or triumph" .)

I've seen this clue in the LA Times.

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.