It's still produced in Ireland though illegally (6)
I believe the answer is:
poteen
I'm afraid I can't even guess how this answer relates to the clue.
Can you help me to learn more?
(Other definitions for poteen that I've seen before include "Home made spirit" , "Illicit Irish hooch" , "Unlawfully distilled Irish whiskey" , "Illegal Irish spirit made in still" , "Illegal spirit distilled from potatoes and other stuff" .)