The most common and most likely answer to this crossword clue is the 13 letter word HUGGER-MUGGER
I've seen this crossword clue in The Guardian
H
U
G
G
E
R
-
M
U
G
G
E
R
More clues leading to the result HUGGER-MUGGER
Buddy explains!

The straight part
We know that "confused" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case confused = hugger-mugger.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 HUGGER-MUGGER mean?
HUGGER-MUGGER noun- Secrecy.
- Disorder.
- To meet or act secretly.
- Secret, clandestine, sly.
- Disorderly, chaotic, confused.
- Secretly.
- Confusedly, in a muddle.