Crossword Genius

Bro, e.g. (3)

Ross

I believe the answer is:

sib

(Another definition for sib that I've seen is " Brother".)

I've seen this clue in The Star Tribune and 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.