Jeweler's eyeglass (5)
I believe the answer is:
loupe
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">jeweler's eyeglass</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for loupe that I've seen before include "Jeweller's magnifying glass" , "Jeweller's eyepiece" , "Jeweller's eyeglass" , "instrument in view of fine work" .)