John Deere product (6)
I believe the answer is:
reaper
'john deere product' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for reaper that I've seen before include "that you don't want to meet if it's grim" , "being grim when you're late" , "Farm machinery" , "Crop harvester" , "Farm worker" .)