The most common and most likely answer to this crossword clue is the 6 letter word CORPSE
I've seen this crossword clue in Financial Times
C
O
R
P
S
E
More clues leading to the result CORPSE
- Chap's rear squeezed into short item of underwear: laugh uncontrollably
- Crack up on the boards
- Dead body of rook in a group of trees
- Body Romeo dragged into thicket
- Stiff run through wooded area
- Run into trees and laugh uncontrollably
- Ballet dancers collectively needing energy to get stiff?
- Body of king found in thicket
- Body of rector found in wood
- Fall about when company needs final cue
Buddy explains!

The straight part
We know that "Fall/Fa/ll/ about" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case fall/fa/ll/ about = corpse.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 CORPSE mean?
CORPSE noun- A dead body.
- (sometimes derogatory) A human body in general, whether living or dead.
- (of an actor) To lose control during a performance and laugh uncontrollably.