Pharmaceutical product (4)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pharmaceutical product</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for drug that I've seen before include "Medication" , "Maybe addictive substance" , "Chemical medicament" , "Medical or narcotic substance" , "Perhaps grass" .)