The most common and most likely answer to this crossword clue is the 5 plus 4 letter word BELLY FLOP
I've seen this crossword clue in The Guardian
B
E
L
L
Y
F
L
O
P
More clues leading to the result BELLY FLOP
- Corporation to fail — botched entry from board
- Corporation founder’s shambolic board manoeuvre?
- Corporation to fail — botched entry from board?
- Poor entry resulting from failure of corporation?
- Corporation’s the first to make contact with this dive
- Scientist to fly out before work, and jump into a pool
- Call Yankee near Turkey making bad landing
Buddy explains!

The straight part
We know that "shambolic board manoeuvre" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case shambolic board manoeuvre = belly flop.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 BELLY FLOP mean?
BELLY FLOP noun- A style of diving into a body of water in which the surface impact is made mostly by one's abdomen.