A farm worker, one gathers (6)
I believe the answer is:
reaper
I believe this clue is a double definition.
'a farm worker' is the first definition.
(I know that reaper is a type of farm worker)
'one gathers' is the second definition.
(I've seen this before)
(Other definitions for reaper that I've seen before include "Farm worker" , "Farm machine (possibly grim?)" , "Crop harvester" , "One gathers" , "being grim when you're late" .)