Cause to lose composure (5)

I believe the answer is:

upset

(Other definitions for upset that I've seen before include "Capsize" , "Out of sorts" , "Put out" , "Make unhappy; disrupt" , "Surprise - distress" .)

I've seen this clue in The Irish 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.