Sight organs (4)
I believe the answer is:
eyes
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sight organs</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 eyes that I've seen before include "Organs of vision" , "Marks on potatoes" , "Are they made to suggest possible date" , "Globular organs" , "Visual organs" .)