How a user gets sorted by drugs stores (10)

I believe the answer is:

warehouses

'stores' is the definition.
(I know this)

'how a user gets sorted by drugs' is the wordplay.
'gets sorted' indicates anagramming the letters.
'by' is a charade indicator (letters next to each other).
'drugs' becomes 'es' (ecstasy tablets).
'how'+'a'+'user'='howauser'
'howauser' is an anagram of 'warehous'.
'warehous'+'es'='WAREHOUSES'

(Another definition for warehouses that I've seen is " storage units".)

I've seen this clue in The Guardian.

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