The most common and most likely answer to this crossword clue is the 11 letter word PERIODICALS
I've seen this crossword clue in The Daily Telegraph
P
E
R
I
O
D
I
C
A
L
S
More clues leading to the result PERIODICALS
Buddy explains!

The straight part
We know that "Magazines" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case magazines = periodicals.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 PERIODICALS mean?
PERIODICALS noun- A publication issued regularly, but less frequently than daily.
- A regularly issued thematic publication that contains the most current information in its field, often the primary means for communication of original scholarship or creative work at the cutting edge of research in its field.