Crossword Genius

Bulgarian lacks aura that's synonymous with ostentatious jewellery (5)

Ross

I believe the answer is:

bling

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

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

Can you help me to learn more?

(Other definitions for bling that I've seen before include "Jewellery for show" , "glitzy jewellery" , "Showy jewellery" , "Showy jewels etc" , "Jazzy" .)

I've seen this clue in the Irish Times (Crosaire) and The Irish Times.
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