Weakest man on board? (4)

I believe the answer is:

pawn

(Other definitions for pawn that I've seen before include "Lowest ranking chessman" , "One getting used" , "Get ready for" , "man on board" , "Insignificant player" .)

I've seen this clue in The Guardian.

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.