Foreign settlement? (10)
I believe the answer is:
emigration
'foreign settlement?' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Maybe there's a link between them I don't understand?
This is all the clue.
Can you help me to learn more?
(Other definitions for emigration that I've seen before include "Departure from country" , "Act of leaving one's own country for good" , "Imagine rot (anag.)" .)