The most common and most likely answer to this crossword clue is the 9 letter word WHEREFORE
W
H
E
R
E
F
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R
E
Buddy explains!
The straight part
We know that "Why" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case why = wherefore.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 WHEREFORE mean?
WHEREFORE noun- An intent or purpose; a why.
- (interrogative) Why, for what reason, because of what.
- (indicative) Therefore.
- Because of which.