Horse family animal (3)

I believe the answer is:

ass

(Other definitions for ass that I've seen before include "Foolish person; animal" , "Pompous fool or beast of burden" , "Idiotic animal" , "Democratic mascot" , "Silly fool or beast of burden" .)

I've seen this clue in The Washington Post.

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.