Intense light beam (5)

I believe the answer is:

laser

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

This is the entire clue.

(Other definitions for laser that I've seen before include "Light-gun" , "Device producing an intense light beam - kind of sailing dinghy" , "Intense light generator" , "Powerful light source" , "Device producing an intense beam of light or radiation" .)

I've seen this clue in the Evening Standard, the Penny Press, The Guardian and The Sun.

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