The most common and most likely answer to this crossword clue is the 12 letter word EYEWITNESSES
I've seen this crossword clue in Independent
E
Y
E
W
I
T
N
E
S
S
E
S
More clues leading to the result EYEWITNESSES
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 EYEWITNESSES mean?
EYEWITNESSES noun- Someone who sees an event and can report or testify about it.