Crossword Genius

Light touch making you sound radical (5)

Ross

I believe the answer is:

torch

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'light' is the definition.
(type of light)

I don't understand the remainder of the clue.

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(Other definitions for torch that I've seen before include "Set fire to (something)" , "Source of light" , "Link" , "Set alight deliberately" , "Small portable battery-powered electric lamp" .)

I've seen this clue in The Daily Express.
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