The most common and most likely answer to this crossword clue is the 9 letter word TRANSPIRE
I've seen this crossword clue in Financial Times
T
R
A
N
S
P
I
R
E
More clues leading to the result TRANSPIRE
- Partner is in trouble, that’s become apparent
- Happen to be right about anger following answer by Penny
- A sprinter unlikely to turn out
- Happen to find terrapins at sea
- Happen to exhale
- Tory leader managed summit to become known
- After destroying string of characters Transylvanian vampire’s come to the light of day
- Happen to bring up Italy going top
- Turn out when a sprinter is replaced
- Arise as priest’s last organised part of church
Buddy explains!

The straight part
We know that "turn out" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case turn out = transpire.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 TRANSPIRE mean?
TRANSPIRE verb- To give off (vapour, waste matter etc.); to exhale (an odour etc.).
- To perspire.
- Of plants, to give off water and waste products through the stomata.
- To become known; to escape from secrecy.
- To happen, take place.