The most common and most likely answer to this crossword clue is the 8 letter word EYEGLASS
I've seen this crossword clue in Financial Times
E
Y
E
G
L
A
S
S
More clues leading to the result EYEGLASS
- Old version of The Mirror put on electronic viewing device
- Vision aid? One not required by eagles, say, silly
- Lens used to observe ocular prosthesis having exchanged components
- Catch a glimpse of good girl in this?
- One that reads the Mirror in Lens?
- Ogle German girl with it?
- It could help you see, for example, girl – you may be enthralled
- A singular spectacle?
- Yours truly, say, slags off viewer
- See good girl in monocle
Buddy explains!
The straight part
We know that "viewer" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case viewer = eyeglass.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does EYEGLASS mean?
EYEGLASS noun- An artificial lens, especially one of a pair.
- A monocle.
- An eyepiece.
- The lens of the eye.