Crossword Genius

Concerning drug addiction loses appeal here (5)

Ross

I believe the answer is:

rehab

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'here' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'concerning drug addiction loses appeal' is the wordplay.
'concerning drug' becomes 're' (I am not sure about this - if you are sure you should believe this answer much more).
'addiction' becomes 'habit' (I've seen this in another clue).
'loses' suggests deleting specific letters.
'appeal' becomes 'it' ('it' can mean something attractive or appealing).
'habit' with 'it' taken out is 'hab'.
're'+'hab'='REHAB'

Can you help me to learn more?

(Other definitions for rehab that I've seen before include "A herb (anag.)" , "Treatment centre (abbrev.)" , "Process of restoring, eg, an addict to health" , "Restorative care" , "Treatment for alcoholism" .)

I've seen this clue in The Times and The Sunday Times.
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