The most common and most likely answer to this crossword clue is the 5 letter word EXILE
I've seen this crossword clue in The Guardian
E
X
I
L
E
More clues leading to the result EXILE
- Refugee with no time at all for material
- Outcast Felix eventually shows up
- Outlaw formerly spotted on French island
- Refugee finding foreign article in river
- Former partner yours truly will reportedly banish
- Old priest backing Romeo in Mantua?
- Banish from English team taking on the French
- Deport half of 11 out of 12 shortly
- Displaced person always killing time in Jersey?
- European story, probed by Times, backing person living elsewhere
Buddy explains!

The straight part
We know that "political sentence" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case political sentence = exile.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 EXILE mean?
EXILE noun- The state of being banished from one's home or country.
- Someone who is banished from their home or country.
- To send into exile.