Sign of an addition (5)

I believe the answer is:

caret

(Other definitions for caret that I've seen before include "Weeding tool" , "Upward arrow mark" , "A sign something is missing" , "Particular mark" , "Proofreader's sign of omission" .)

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.