Crossword Genius

Electric signalling system chiefly by wired channels (3-2-4)

Ross

I believe the answer is:

fly-by-wire

I'm a little stuck... Click here to teach me more about this clue!

'electric signalling system chiefly' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'by wired channels' is the wordplay.
I cannot really see how this works, but
'by' is found in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Another definition for fly-by-wire that I've seen is " Form of aircraft control".)

I've seen this clue in The Hindu.
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