Feeble, insipid (5-5)
I believe the answer is:
wishy-washy
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">feeble</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">insipid</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ ></span>
(Other definitions for wishy-washy that I've seen before include "Bland -- pale" , "Ineffectual" , "Feeble, insipid" , "Watered-down" , "Diluted" .)