The most common and most likely answer to this crossword clue is the 10 plus 1 letter word INVIOLATE} –
I've seen this crossword clue in The Daily Telegraph
I
N
V
I
O
L
A
T
E
}
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“
Buddy explains!
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 INVIOLATE} – mean?
INVIOLATE} – adjective- Not violated; free from violation or hurt of any kind; secure against violation or impairment.
- Incorruptible.