Crossword Genius

Light bulb wire (8)

Ross

I believe the answer is:

filament

(Other definitions for filament that I've seen before include "Slender fibre or wire" , "'Thin wire, in a bulb say (8)'" , "Strand" , "Part of light" , "Fine thread" .)

I've seen this clue in The Independent and the King Feature Syndicate.
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