The most common and most likely answer to this crossword clue is the 8 letter word DEPRAVED
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The straight part
We know that "corrupt" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case corrupt = depraved.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 DEPRAVED mean?
DEPRAVED verb- To speak ill of; to depreciate; to malign; to revile
- To make bad or worse; to vitiate; to corrupt
- Perverted or extremely wrong in a moral sense.
- Distorted out of the normal course; abnormal.