The most common and most likely answer to this crossword clue is the 3 plus 3 plus 3 plus 3 plus 3 plus 3 plus 3 letter word ALL FOR ONE AND ONE FOR ALL
A
L
L
F
O
R
O
N
E
A
N
D
O
N
E
F
O
R
A
L
L
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.