The most common and most likely answer to this crossword clue is the 5 plus 4 letter word COVER NOTE
C
O
V
E
R
N
O
T
E
More clues leading to the result COVER NOTE
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.