Settle on Scottish island, coming home at last (7)
I believe the answer is:
arrange
'settle on' is the definition.
(I've seen this before)
'scottish island coming home at last' is the wordplay.
'scottish island' becomes 'arran' (island off the coast of Scotland).
'at last' says to take the final letters.
The final letters of 'coming home' are 'ge'.
'arran'+'ge'='ARRANGE'
(Other definitions for arrange that I've seen before include "Bring about or put in order" , "Put in order; make plans" , "Set in order" , "position" , "Put in order; plan" .)