Drug addicts (5)
I believe the answer is:
users
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">drug addicts</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 users that I've seen before include "People with a drug habit" , "Drug addicts" , "Customers" , "subscribers" , "Utilisers" .)