Lessened, decreased (7)
I believe the answer is:
reduced
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">lessened</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(reducing is a kind of lessening)</span><br/ ><br/ >'<span class="explanation-format__original">decreased</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(reducing is a kind of decreasing)</span><br/ ><br/ ></span>
(Other definitions for reduced that I've seen before include "Got rid of some bodily weight" , "Made less in size etc" , "Decreased, cut down" , "brought down" , "Lowered in price" .)