Line of sight? (8)
I believe the answer is:
reticule
This clue could be a double definition.
'line' is the first definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'sight?' is the second definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?
'of' is the link.
Can you help me to learn more?
(Other definitions for reticule that I've seen before include "Lady's bag once" , "Old bag" , "Lady's old drawstring handbag" , "Woman's small bag" , "Woman's small handbag in the form of a pouch" .)