Face cover (5)
(Other definitions for visor that I've seen before include "Sunscreen" , "Anti-glare flap over the windscreen" , "Face-armour" , "Movable front part of helmet" , "Face armour" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">face cover</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for mask that I've seen before include "False face" , "Camouflage" , "One hiding, protecting face" , "Screen" , "Cover for the face" .)