5 across
Ranges
of
jewellery
items
(6)
Ranges of jewellery items (6)
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The whole clue is the definition (& lit or double definition).
How the clue works
This is a double definition clue, where both halves point to the same answer independently. Ranges gives you the word in the sense of mountain chains or retail chains, and jewellery items gets you there just as well — think necklaces and the like worn round the neck.