Dignified, grand (7)
I believe the answer is:
I believe this clue is a double definition.
'dignified' is the first definition.
(similar in meaning)
'grand' is the second definition.
(I've seen this in another clue)
(Other definitions for stately that I've seen before include "Grand, dignified" , "August" , "Courtly; imposing" , "Imperial" , "` `In Xanadu did Kubla Khan / A ....... pleasure-dome decree' ' (Coleridge)" .)