Cryptic crossword clue
Facility for communication either way in show, if I want 2-2

The most common and most likely answer to this crossword clue is the 4 letter word WIFI

I've seen this crossword clue in The Guardian
W
I
F
I

Buddy explains!

The straight part
We know that "Facility for communication" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case facility for communication = wifi.
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 WIFI mean?

WIFI noun
  1. Any of several standards for short-range wireless data transmission (IEEE 802.11).
  2. Wireless networking using one of these standards.
  3. The capability to connect to a Wi-Fi network.

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