Weaselly words in house (7)

I believe the answer is:

windsor

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'house' is the definition.
(royal house)

'weaselly words in' is the wordplay.
'words in' anagrams to 'WINDSOR'.
But, I'm not sure how this is indicated.

Can you help me to learn more?

(Other definitions for windsor that I've seen before include "Noble family" , "town near Eton" , "Family name replacing Saxe-Coburg-Gotha in 1917" , "Royal palace" , "-chair; -knot; -castle" .)

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