Hide weapon to end quarrel (4,3,7)
I believe the answer is:
bury the hatchet
'end quarrel' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.
'hide weapon' is the wordplay.
I cannot quite understand how this works, but
'hide' could be 'bury' (burying is a kind of hiding) and 'bury' is found within the answer.
'weapon' could be 'hatchet' (hatchet is a kind of weapon) and 'hatchet' is present in the answer.
The remaining letters 'the' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'to' acts as a link.
Can you help me to learn more?
(Other definitions for bury the hatchet that I've seen before include "Become reconciled" , "end feud - with 18d" , "having decided against axing?" , "Settle quarrel" , "sinking of cutter" .)