Crossword Genius

Coherent light beam (5)

Ross

I believe the answer is:

laser

'coherent light beam' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for laser that I've seen before include "Surgical device" , "Powerful light source" , "Intense light generator" , "Device producing thin beam of light" , "Source of intense beam" .)

I've seen this clue in The Times.
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