Used by the spirit producer to this day
I believe the answer is:
still
'to this day' is the definition.
(I've seen this in another clue)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for still that I've seen before include "Motionless, not sparkling" , "inaudible" , "A place to make liquor" , "subdued" , "Stop" .)