The most common and most likely answer to this crossword clue is the 9 letter word TAUTOLOGY
I've seen this crossword clue in Independent
T
A
U
T
O
L
O
G
Y
Buddy explains!
The straight part
We know that "myself personally?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case myself personally? = tautology.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 TAUTOLOGY mean?
TAUTOLOGY noun- Redundant use of words, a pleonasm, an unnecessary and tedious repetition.
- An expression that features tautology.
- In propositional logic: a statement that is true for all truth values of its propositional variables. In first-order logic: a statement that is true for all truth values of its Boolean atoms.