Could this be Jade Jagger? (5)

I believe the answer is:

stone

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This clue could be a double definition.

'could this be jade' is the first definition.
'stone' can be an answer for 'be jade' (thesaurus). I'm not sure about the rest of the definition.

'jagger?' is the second definition.
(Mick Jagger is one of the Rolling Stones)

Can you help me to learn more?

(Other definitions for stone that I've seen before include "See 5" , "Rock; gem" , "Piece of rock - weight" , "Gem; Staffs. town" , "Seed of e.g. cherry" .)

I've seen this clue in The Independent.

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