The most common and most likely answer to this crossword clue is the 10 letter word SUPPRESSED
I've seen this crossword clue in The Times
S
U
P
P
R
E
S
S
E
D
Buddy explains!

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 SUPPRESSED mean?
SUPPRESSED verb- To put an end to, especially with force, to crush, do away with; to prohibit, subdue.
- To restrain or repress, such as laughter or an expression.
- To exclude undesirable thoughts from one's mind.
- To prevent publication.
- To stop a flow or stream.
- To forbid the use of evidence at trial because it is improper or was improperly obtained.
- To reduce unwanted frequencies in a signal.
- To hold in place, to keep low.