The most common and most likely answer to this crossword clue is the 5 letter word TELEX
I've seen this crossword clue in Financial Times
T
E
L
E
X
More clues leading to the result TELEX
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 TELEX mean?
TELEX noun- A communications system consisting of a network of teletypewriters.
- A message sent through such a network.
- The machine used to send and receive such messages.
- To send (a message) by telex.