Crossword Genius

The Observer's view of who's calling Grace O'Malley's visual aid for a close up?

Ross

I believe the answer is:

spyglass

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'the observer's view' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for spyglass that I've seen before include "viewer" , "little scope" , "that magnifies" , "he can see through it!" , "See-through article" .)

I've seen this clue in The Irish Times.
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