The most common and most likely answer to this crossword clue is the 4 plus 3 plus 4 plus 4 letter word WISH YOU WERE HERE
I've seen this crossword clue in The Times
W
I
S
H
Y
O
U
W
E
R
E
H
E
R
E
More clues leading to the result WISH YOU WERE HERE
Buddy explains!
The straight part
We know that "Regular comment on a break in communications" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case regular comment on a break in communications = wish you were here.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.