Beam in relief having risen in rank (7)

I believe the answer is:

radiate

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'beam' is the definition.
(I know that beam can be written as radiate)

I can't explain the rest of the clue.

(Other definitions for radiate that I've seen before include "Disseminate" , "Emit light/heat" , "Give out (light, etc)" , "Spread outwards" , "Emit (rays or waves)" .)

I've seen this clue in The Times.

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