Drug-dependent (8)
I believe the answer is:
addicted
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">drug-dependent</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for addicted that I've seen before include "Seriously devoted (to a particular activity)" , "Dependent on something habit-forming" , "Dependent on drugs" , "Dependent, hooked" , "Cadet did become compelled to use harmful substance (8)" .)