Eye shield (5)
I believe the answer is:
visor
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">eye shield</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 visor that I've seen before include "Transparent flap on a helmet" , "Face-armour" , "Sunshade" , "Face armour" , "Mask" .)