Crossword Genius

Earls running from light (5)

Ross

I believe the answer is:

laser

'light' is the definition.
(lasers are a type of light)

'earls running' is the wordplay.
'running' is an anagram indicator (the letters run around to different places).
'earls' anagrammed gives 'LASER'.

'from' acts as a link.

(Other definitions for laser that I've seen before include "Device for concentrating light" , "Intense and concentrated beam of light" , "Device that produces an intense beam of light" , "Coherent light-beam" , "Powerful light source" .)

I've seen this clue in The Mirror.
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