The most common and most likely answer to this crossword clue is the 7 plus 9 letter word GISCARD D'ESTAING
I've seen this crossword clue in The Times
G
I
S
C
A
R
D
D
'
E
S
T
A
I
N
G
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.