Glasses, informally (5)
I believe the answer is:
specs
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">glasses informally</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 specs that I've seen before include "Glasses (sl.)" , "Do they help one to see" , "Glasses (colloq.)" , "you can see right through them" , "provider of focus" .)