The most common and most likely answer to this crossword clue is the 8 letter word EMIGRATE
I've seen this crossword clue in The Guardian
E
M
I
G
R
A
T
E
More clues leading to the result EMIGRATE
- English judge inspires fighter to leave country
- Go overseas? Good to enter Arab state
- Leave country house, heading off to get someone’s goat?
- Russian fighter, traitor in central Greece, to settle abroad
- Relocate German in Abu Dhabi, perhaps
- 24 Good to reside in foreign country? Do this?
- A regime in chaos – about time to leave for ever
- Move to a new country home
- Record label getting good price to relocate overseas
- Leave the country and head off east, taking plane at speed
Buddy explains!

The straight part
We know that "to relocate overseas" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case to relocate overseas = emigrate.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does EMIGRATE mean?
EMIGRATE verb- To leave the country in which one lives, especially one's native country, in order to reside elsewhere.