The most common and most likely answer to this crossword clue is the 6 plus 6 plus 3 plus 2 plus 1 plus 4 letter word HUMPTY DUMPTY SAT ON A WALL
I've seen this crossword clue in Independent
H
U
M
P
T
Y
D
U
M
P
T
Y
S
A
T
O
N
A
W
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.