What Kubla Khan decreed in Xanadu? (7)

I believe the answer is:

stately

(Other definitions for stately that I've seen before include "Impressive in appearance; majestic" , "August" , "Impressive in manner" , "Formal; type of home" , "` `In Xanadu did Kubla Khan / A ....... pleasure-dome decree' ' (Coleridge)" .)

I've seen this clue in The Guardian.

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