The most common and most likely answer to this crossword clue is the 7 letter word INBOXES
I've seen this crossword clue in Independent
I
N
B
O
X
E
S
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 INBOXES mean?
INBOXES noun- A container in which papers to be dealt with are put.
- An electronic folder serving the same purpose.
- The aggregate of items that demand one's attention or effort.