Hole in a needle (3)
I believe the answer is:
eye
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hole in a needle</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 eye that I've seen before include "Watch - middle of cyclone" , "Regard" , "study" , "May be private" , "Orb" .)