Still or inactive (8)
I believe the answer is:
stagnant
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">still</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >'<span class="explanation-format__original">inactive</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 stagnant that I've seen before include "(Water) not flowing" , "Showing little activity" , "(Of water) motionless" , "Brackish and foul" , "Still and foul" .)