Confused impression (4)
I believe the answer is:
blur
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">confused impression</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for blur that I've seen before include "Mist" , "Pop group; make unclear" , "Indistinct impression" , "Ill-defined smear" , "Indistinct appearance like smear" .)