Reaper's implement (6)
I believe the answer is:
scythe
'reaper's implement' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for scythe that I've seen before include "Old-fashioned hand-held hay mower" , "Reaper's implement" , "Implement with curved blade" , "Edge tool" , "what the reaper holds" .)