The most common and most likely answer to this crossword clue is the 6 letter word DRYROT
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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 DRYROT mean?
DRYROT noun- The crumbly, friable decayed portions of wooden members of buildings, especially at or below grade, usually caused by a fungal infection.
- Any progression of decay, corruption, or obsolescence.
- A fungal infection which affects plants, in particular potatoes.