Les Remarquables de Martell is, possibly, the most exclusive bottling of this type of brandy in the world (6)

I believe the answer is:

cognac

(Other definitions for cognac that I've seen before include "Liquor" , "High-quality brandy" , "French town - French brandy" , "Brandy as for Napoleon (6)." , "French brandy region" .)

I've seen this clue in The Times.

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.