The most common and most likely answer to this crossword clue is the 9 letter word DESTROYED
I've seen this crossword clue in The Guardian
D
E
S
T
R
O
Y
E
D
More clues leading to the result DESTROYED
- Wrecked, replacement of odd tyres saving vehicle, finally
- Ruined southern city once involved in exploit
- Smashed up Helen’s place, stabbing a couple of blokes
- Sacked second ancient city captured in heroic exploit
- . Obliterated Helen's city after shelling initially? Indeed!
- . Document describing southern city of old wiped off the map
- Obliterated legal document to hide problematic story
- Forged deeds Tory put through the shredder?
- Trashed second old city during performance
Buddy explains!

The straight part
We know that "Sacked" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case sacked = destroyed.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 DESTROYED mean?
DESTROYED verb- To damage beyond use or repair.
- To neutralize, undo a property or condition.
- To put down or euthanize.
- To severely disrupt the well-being of (a person); ruin.
- To defeat soundly.
- To remove data.
- To sing a song poorly.
- (antiphrasis) To exhaust duly and thus recreate or build up.
- To penetrate sexually in an aggressive way.
- (particularly of a child) soiled, muddied, especially as a result of a fall or spill.