___ grinder (espresso bar fixture) (4)

I believe the answer is:

burr

(Other definitions for burr that I've seen before include "Rough projection left after cutting" , "Seeds with prickles" , "impediment?" , "trouble" , "Rough edge left on metal by tool" .)

I've seen this clue in the Universal.

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.