Spot crown jewels kings must leave for display (9)

I believe the answer is:

spectacle

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'display' is the definition.
(spectacle is a kind of display)

I don't understand the remainder of the clue.

(Other definitions for spectacle that I've seen before include "Picture" , "curiosity" , "one of a pair for viewers?" , "Showy pageant" , "Something worth seeing" .)

I've seen this clue in The Times.

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