Shine as one wanting desperately to be heard (6)

I believe the answer is:

lustre

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'shine' is the definition.
(I know that lustre is a type of shine)

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

Can you help me to learn more?

(Other definitions for lustre that I've seen before include "Gentle sheen, soft glow" , "Gloss, brightness" , "effect of reflected light" , "Brilliancy" , "Distinction < in five years" .)

I've seen this clue in The Guardian.

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