The most common and most likely answer to this crossword clue is the 7 letter word MONOCLE
I've seen this crossword clue in The Times
M
O
N
O
C
L
E
More clues leading to the result MONOCLE
- Study mounts through spy lens
- Visual aid designed for single pupil
- U-turn of Tory seen through spy lens
- A single spectacle
- Cool men sport an eyeglass!
- In Paris, my uncle loses second new visual aid
- In Paris, my uncle loses second new lens
- No clarity initially in spy lens
- Male and female singeroffering means for observation
- One helps to improve a pupil’s performance
Buddy explains!
The straight part
We know that "Visual aid designed for single pupil" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case visual aid designed for single pupil = monocle.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 MONOCLE mean?
MONOCLE noun- A single lens, usually in a wire frame, and used to correct vision for only one eye.
- A one-eyed animal.