The most common and most likely answer to this crossword clue is the 3 plus 6 letter word RUE MORGUE
I've seen this crossword clue in Financial Times
R
U
E
M
O
R
G
U
E
Buddy explains!
The straight part
We know that "scene of 1 down’s 27" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case scene of 1 down’s 27 = rue morgue.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.