Royal house of Great Britain from 1714 to 1901 (7)

I believe the answer is:

hanover

(Other definitions for hanover that I've seen before include "10 [HOUSE]" , "9 [HOUSE]" , "Royal house after Stuarts" , "German 22 Across" , "German town, and royal house" .)

I've seen this clue in The Times.

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