Less sound (7)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">less sound</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for weaker that I've seen before include "Less strong" , "Less powerful" , "More lacking in strength" , "More powerless" , "More feeble or frail" .)