Subsides (6)
I believe the answer is:
abates
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">subsides</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 abates that I've seen before include "Diminishes" , "Makes less intense" , "lowers" , "has a fall" , "moderates" .)