The most common and most likely answer to this crossword clue is the 10 letter word BLUNDERING
I've seen this crossword clue in The Daily Telegraph
B
L
U
N
D
E
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 BLUNDERING mean?
BLUNDERING verb- To make a clumsy or stupid mistake.
- To move blindly or clumsily.
- To cause to make a mistake.
- To do or treat in a blundering manner; to confuse.
- The act of making a blunder.