The most common and most likely answer to this crossword clue is the 13 letter word BAMBOOZLEMENT
I've seen this crossword clue in Financial Times
B
A
M
B
O
O
Z
L
E
M
E
N
T
Buddy explains!
The straight part
We know that "confusion" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case confusion = bamboozlement.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 BAMBOOZLEMENT mean?
BAMBOOZLEMENT noun- The act or process of bamboozling or being bamboozled.