The most common and most likely answer to this crossword clue is the 7 letter word E-MAILS
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More clues leading to the result E-MAILS
Buddy explains!
The straight part
We know that "communication systems" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case communication systems = e-mails.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 E-MAILS mean?
E-MAILS noun- A system for transferring messages from one computer to another, usually through a network.
- A quantity of messages sent through an email system.
- A message sent through an email system.
- An email address.
- Enamel.