Forceful, impassioned (8)
I believe the answer is:
vehement
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">forceful</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >'<span class="explanation-format__original">impassioned</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Other definitions for vehement that I've seen before include "Forceful, ardent" , "Even them being intense, showing strong feeling" , "Forcefully emphatic" , "Energetic" , "Zealously forceful" .)