The most common and most likely answer to this crossword clue is the 8 letter word POLLUTES
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The straight part
We know that "Corrupts" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case corrupts = pollutes.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 POLLUTES mean?
POLLUTES verb- To make something harmful, especially by the addition of some unwanted product.
- To make something or somewhere less suitable for some activity, especially by the introduction of some unnatural factor.
- To corrupt or profane
- To violate sexually; to debauch; to dishonour.