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Might be annoyed if Icelanders take over the building (7)

Ross

I believe the answer is:

edifice

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'the building' is the definition.
(synonyms)

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for edifice that I've seen before include "'Large, imposing building (7)'" , "Grand building" , "Construction" , "Permanent building" , "Impressive building" .)

I've seen this clue in The Irish Times.
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