The most common and most likely answer to this crossword clue is the 10 letter word BELABORING
B
E
L
A
B
O
R
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.
What does BELABORING mean?
BELABORING verb- To labour about; labour over; work hard upon; ply diligently.
- To beat soundly; thump; beat someone.
- To attack someone verbally.
- To discuss something repeatedly; to harp on.