Crossword Genius

Through which to view star? (8)

Ross

I believe the answer is:

skylight

This clue could be a double definition.

'through which to view' is the first definition.
(skylight is a type of window)

'star?' is the second definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.

(Other definitions for skylight that I've seen before include "Window in a roof or ceiling" , "Attic window" .)

I've seen this clue in The Times.
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