Old man's edgy companion? (6)
I believe the answer is:
scythe
'edgy companion?' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.
'old man's' is the wordplay.
I cannot quite see how this works, but
'man' could be 'cy' and 'cy' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for scythe that I've seen before include "Cut down manually" , "Agricultural tool" , "Old hand-held cutter of hay" , "Implement for cutting long grass" , "Manual hay-cutter wielded with both hands" .)