Visual aids (7)
I believe the answer is:
glasses
'visual aids' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for glasses that I've seen before include "Spectacles; schooners" , "are they full of alcohol?" , "Spectacles; tumblers" , "Spectacles or drinking containers" , "Help in making out" .)