Star making a return appearance in Wigmore Hall (4)

I believe the answer is:

hero

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'star' is the definition.
(I've seen this before)

I don't understand the rest of the clue.

(Other definitions for hero that I've seen before include "Star" , "Principal character in a film or novel" , "Male protagonist" , "Principal boy" , "Person renowned for bravery" .)

I've seen this clue in The Times.

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