He may shed a little light on things (3)

I believe the answer is:

ray

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'he' is the definition.

I don't understand how the rest of the clue works.

(Other definitions for ray that I've seen before include "Gleam" , "Second note for the flat fish" , "Flash < Movie Player" , "Flatfish or sunbeam" , "A little light" .)

I've seen this clue in the Evening Standard.

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