Mask (4)
'mask' is the definition.
(both can mean to conceal or cover up)
This is all the clue.
(Other definitions for hide that I've seen before include "(Place of) conceal(ment)" , "Place to observe wildlife" , "Animal's tough skin" , "Not show" , "Tanned skin of an animal" .)
'mask' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for veil that I've seen before include "Women's face covering of live kind" , "Material over face" , "Face concealer" , "Conceal, screen" , "Cover, conceal" .)
'mask' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for visor that I've seen before include "Transparent flap on a helmet" , "shade" , "Part of an armour helmet" , "Front piece of a helmet" , "Protection for face (or against glare)" .)