Visual (7)
'visual' is the definition.
(I know that visual can be written as optical)
This is all the clue.
(Other definitions for optical that I've seen before include "Relating to sight" , "Relating to vision and light" , "Coal tip (anag)" , "some kind of illusion" , "Capitol (anag.)" .)
'visual' is the definition.
(I know that visual can be written as optic)
This is the entire clue.
(Other definitions for optic that I've seen before include "Body part" , "of a viewer?" , "Relating to the eyes" , "Topic (anag.)" , "Device for dispensing measures of spirits" .)