The most common and most likely answer to this crossword clue is the 11 letter word SOOTHSAYERS
I've seen this crossword clue in The Daily Telegraph
S
O
O
T
H
S
A
Y
E
R
S
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 SOOTHSAYERS mean?
SOOTHSAYERS noun- One who tells the truth; a truthful person
- One who predicts the future, using magic, intuition or intelligence; a diviner
- A mantis or rearhorse