The most common and most likely answer to this crossword clue is the 7 plus 2 plus 3 letter word INCLUDE ME OUT
I've seen this crossword clue in Financial Times
I
N
C
L
U
D
E
M
E
O
U
T
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.