The most common and most likely answer to this crossword clue is the 9 letter word TRANSMUTE
I've seen this crossword clue in Financial Times
T
R
A
N
S
M
U
T
E
More clues leading to the result TRANSMUTE
- Saying nothing after Stan drunkenly pockets right change
- First pair of trousers man’s torn on truck – change into something else
- Change tutors, with dumb one retiring
- In time sweetheart’s performed blue jokes for change
- Change schools when one goes silent
- Change published obscenity in unfinished number
- Hurried in the back way, before silent change
- Said to be in a daze, no volume change
Buddy explains!

The straight part
We know that "change" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case change = transmute.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 TRANSMUTE mean?
TRANSMUTE verb- To change, transform or convert one thing to another, or from one state or form to another.