The most common and most likely answer to this crossword clue is the 9 plus 9 letter word EMOTIONAL BLACKMAIL
E
M
O
T
I
O
N
A
L
B
L
A
C
K
M
A
I
L
More clues leading to the result EMOTIONAL BLACKMAIL
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.