Star Wars weapon (5)

I think it could be either:

Which length description are you looking for?:

laser

'star wars weapon' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for laser that I've seen before include "scientific device" , "Device that produces an intense beam of light" , "Light amplification by stimulated emission of radiation" , "Coherent light beam" , "Source of light; type of printer" .)

I've seen this clue in The Sun.

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