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Fantastic servant's quarters opened by 1? (8,4)

Ross

I believe the answer is:

aladdins lamp

I'm a little stuck... Click here to teach me more about this clue!

This clue could be a double definition.

'fantastic servant's quarters' is the first 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?

'opened by 1?' is the second definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.

Can you help me to learn more?

(Other definitions for aladdins lamp that I've seen before include "that's very beneficial to the rubber" , "Genie's home?" , "Magic wish-granting item" , "light" .)

I've seen this clue in The Telegraph.
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