The most common and most likely answer to this crossword clue is the 11 letter word MALFEASANCE
I've seen this crossword clue in The Daily Telegraph
M
A
L
F
E
A
S
A
N
C
E
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 MALFEASANCE mean?
MALFEASANCE noun- Wrongdoing.
- Misconduct or wrongdoing, especially by a public official and causing damage.