Star as a roof-raiser? (8)
I believe the answer is:
skylight
'star' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for skylight that I've seen before include "Window in a roof or ceiling" , "Attic window" .)