The most common and most likely answer to this crossword clue is the 9 letter word OVERTHROW
I've seen this crossword clue in The Times
O
V
E
R
T
H
R
O
W
More clues leading to the result OVERTHROW
- Defeat the endless argument supporting deliveries
- Put an end to careless action on cricket field?
- Public argument about Hutton’s first poor return?
- Bonus run in passage of play by means of wide
- Get rid of deliveries on Thursday before argument
- Defeat leader of hecklers in public spat
- Best or worst contribution to innings?
- Remove public hotline
- Run from public dispute about hospital
- Upset husband in public squabble
Buddy explains!

The straight part
We know that "Defeat" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case defeat = overthrow.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 OVERTHROW mean?
OVERTHROW noun- A removal, especially of a ruler or government, by force or threat of force.
- An act of throwing something to the ground; an overturning.
- To bring about the downfall of (a government, etc.), especially by force.
- To throw down to the ground, to overturn.
- A throw that goes too far.
- To throw (something) so that it goes too far.