Material used to trim a ship (7)

I believe the answer is:

ballast

(Other definitions for ballast that I've seen before include "Balloon steadier" , "Counterweight" , "Heavy stuff used to stabilise boat" , "Heavy material giving ship stability" , "Weight to stabilise a ship" .)

I've seen this clue in The Sun.

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.