Addiction treatment (5)
I believe the answer is:
rehab
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">addiction treatment</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for rehab that I've seen before include "Course of treatment for addicts" , "Restorative care" , "Process of restoring, eg, an addict to health" , "convalescent home?" , "Treatment centre (abbrev.)" .)