The most common and most likely answer to this crossword clue is the 10 letter word INTERNMENT
I've seen this crossword clue in The Guardian
I
N
T
E
R
N
M
E
N
T
More clues leading to the result INTERNMENT
- One after the other destined, it’s said, for detention
- Confinement among bird people ultimately unpleasant
- Detention of nationalist leader interrupts funeral
- Popular flier planned to avoid American in captivity
- In hearing, one after another, chaps with time in detention
- Precautionary measure, holding funeral without name
- Knight invading being put in grave captivity
- Temp, gutted, fated to confinement
Buddy explains!
The straight part
We know that "Detention/Detention" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case detention/detention = internment.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 INTERNMENT mean?
INTERNMENT noun- Confinement within narrow limits, as of foreign troops, to the interior of a country.