Land, having arrived for some peace and quiet (4,2,4)
I believe the answer is:
come to rest
'land having arrived' is the definition.
I can't judge whether this defines the answer.
'for some peace and quiet' is the wordplay.
'for' becomes 'to' (eg both can mean 'in the opinion of').
'some peace' becomes 'rest' (I've seen this in other clues).
'and' says to put letters next to each other (I've seen this in other clues).
'quiet' becomes 'come' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'to'+'rest'='torest'
'torest' after 'come' is 'COME TO REST'.
Can you help me to learn more?
(Other definitions for come to rest that I've seen before include "Recover - others" , "Halt; dock, alight" , "grind to a halt" , "stop" .)