Texas longhorn's sound (3)

I believe the answer is:

moo

(Other definitions for moo that I've seen before include "Cow's call" , "unpopular woman" , "Irritating woman" , "Guernsey noise?" , "Cow's sound" .)

I've seen this clue in the Universal.

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.