The most common and most likely answer to this crossword clue is the 8 letter word LACKADAY
L
A
C
K
A
D
A
Y
More clues leading to the result LACKADAY
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 LACKADAY mean?
LACKADAY interjection- An expression of regret or grief.