Industrial cutter (5)
I believe the answer is:
laser
'industrial cutter' 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 "Beam (used in surgery)" , "Powerful light source" , "Device producing a narrow, intense beam of light" , "Device that produces an intense beam of light" , "Intense and concentrated beam of light" .)