Telescope parts (6)
I believe the answer is:
lenses
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">telescope parts</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for lenses that I've seen before include "Focussing glasses" , "Eye parts" , "They're transparent in the eyes" , "They could help you see" , "They're transparent in the eye" .)