The most common and most likely answer to this crossword clue is the 9 letter word MISINFORM
I've seen this crossword clue in The Daily Telegraph
M
I
S
I
N
F
O
R
M
More clues leading to the result MISINFORM
- Head of Sixth leaving teacher in class to teach wrongly?
- Lie to schoolgirl doing audition?
- Give fake news to schoolgirl, say?
- Wrongly tell teacher losing tail-ender’s playing well
- Team at last is playing well — fake news?
- Male is member of a class that could be fool
- Deceive girl, almost fashionable model
Buddy explains!
The straight part
We know that "fool" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case fool = misinform.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 MISINFORM mean?
MISINFORM verb- To give or deliver false, fake, or misleading information.