The most common and most likely answer to this crossword clue is the 12 letter word EXTRADITABLE
I've seen this crossword clue in Financial Times
E
X
T
R
A
D
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T
A
B
L
E
Buddy explains!
The straight part
We know that "that could be sent abroad" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case that could be sent abroad = extraditable.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 EXTRADITABLE mean?
EXTRADITABLE adjective- Of a person: able to be extradited.
- Of an action or an offense: for which one can be extradited.