Stonier rocks coming soon (2,5)

I believe the answer is:

in store

'coming soon' is the definition.
(I've seen this before)

'stonier rocks' is the wordplay.
'rocks' indicates an anagram.
'stonier' with letters rearranged gives 'IN-STORE'.

(Other definitions for in store that I've seen before include "Awaiting delivery" , "Put by" , "To come" , "Soon to happen" , "stocked" .)

I've seen this clue in The Telegraph.

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