What to do when no longer having an axe to grind? (4,3,7)
I believe the answer is:
bury the hatchet
'what to do when no longer having an' is the definition.
I know nothing about this answer so I can't tell whether this works.
'axe to grind?' is the wordplay.
I cannot really understand how this works, but
'axe' could be 'hatchet' (hatchet is a kind of axe) and 'hatchet' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for bury the hatchet that I've seen before include "Become reconciled" , "having decided against axing?" , "Settle quarrel" , "sinking of cutter" , "end feud - with 18d" .)