The most common and most likely answer to this crossword clue is the 9 letter word RESULTING
I've seen this crossword clue in The Daily Telegraph
R
E
S
U
L
T
I
N
G
More clues leading to the result RESULTING
Buddy explains!

The straight part
We know that "ending" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case ending = resulting.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 RESULTING mean?
RESULTING verb- To proceed, spring up or rise, as a consequence, from facts, arguments, premises, combination of circumstances, consultation, thought or endeavor.
- (followed by "in") To have as a consequence; to lead to; to bring about
- To return to the proprietor (or heirs) after a reversion.
- To leap back; to rebound.
- Of something that follows as the result of something else.