Varnish constituent (7)

I believe the answer is:

shellac

(Other definitions for shellac that I've seen before include "(it's in old records)" , "Sort of resin" , "Resin from trees" , "coat" , "Defeat" .)

I've seen this clue in The Telegraph.

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.