Be sad about necklace (5)

I believe the answer is:

beads

'necklace' is the definition.
(thesaurus)

'be sad about' is the wordplay.
'about' is an anagram indicator.
'sad' anagrammed gives 'ads'.
'be'+'ads'='BEADS'

(Other definitions for beads that I've seen before include "Small balls for threading on string" , "Small balls with holes through the middle" .)

I've seen this clue in The Mirror.

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