The most common and most likely answer to this crossword clue is the 8 letter word EXPLODED
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More clues leading to the result EXPLODED
Buddy explains!

The straight part
We know that "proved wrong" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case proved wrong = exploded.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 EXPLODED mean?
EXPLODED verb- To destroy with an explosion.
- To destroy violently or abruptly.
- To create an exploded view of.
- To disprove or debunk.
- To blast, to blow up, to burst, to detonate, to go off.
- To make a violent or emotional outburst.
- To increase suddenly.
- (PHP) To break (a delimited string of text) into several smaller strings by removing the separators.
- To decompress (data) that was previously imploded.
- To open all doors and hatches on an automobile.