Crossword Genius

Class of single-handed, one-design sailing dinghies designed by Bruce Kirby in 1970 (5)

Ross

I believe the answer is:

laser

(Other definitions for laser that I've seen before include "Surgical device" , "Device producing a narrow, intense beam of light" , "Device producing thin beam of light" , "Source of intense beam" , "Coherent light-beam" .)

I've seen this clue in The Independent.
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