The most common and most likely answer to this crossword clue is the 5 plus 3 letter word GLASS EYE
I've seen this crossword clue in The Times
G
L
A
S
S
E
Y
E
More clues leading to the result GLASS EYE
- It can't be seen through, despite being of transparent material
- Good girlie mag. for the non-working viewer
- Switching parts of lens to make tear-resistant device
- Good girl, yes, I hear, but not really a looker
- Patch might hide this new ball
- Good girl I heard, not a good looker though.
- Quartz watch that doesn’t look for real?
- It provides a false outlook on events?
- Not a good looker!
- One can’t see vessel near centre of storm
Buddy explains!
The straight part
We know that "It can't be seen through, despite being of transparent material" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case it can't be seen through, despite being of transparent material = glass eye.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.