The most common and most likely answer to this crossword clue is the 8 letter word YOURSELF
I've seen this crossword clue in The Guardian
Y
O
U
R
S
E
L
F
More clues leading to the result YOURSELF
Buddy explains!
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 YOURSELF mean?
YOURSELF pronoun- (reflexive pronoun) Your own self (singular).
- You (singular); used emphatically, especially to indicate exclusiveness of the referent's participation in the predicate, i.e., that no one else is involved.