The most common and most likely answer to this crossword clue is the 9 letter word CIRCUITRY
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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 CIRCUITRY mean?
CIRCUITRY noun- A specific system of electrical circuits in a particular device; the design of such a system.
- Electrical (or, by extension, other) circuits considered as a group.
- The brain's neural network.