The most common and most likely answer to this crossword clue is the 11 letter word BED-WETTING
I've seen this crossword clue in The Guardian
B
E
D
-
W
E
T
T
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 BED-WETTING mean?
BED-WETTING noun- Involuntary urination while asleep