The most common and most likely answer to this crossword clue is the 8 letter word RETICULA
I've seen this crossword clue in Independent
R
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T
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C
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A
More clues leading to the result RETICULA
Buddy explains!

The straight part
We know that "networks" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case networks = reticula.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 RETICULA mean?
RETICULA noun- The reticular formation.
- A network.
- A pattern of interconnected objects.
- The second compartment of the stomach of a cow or other ruminant.