Dialect around the Kremlin? (7)
I believe the answer is:
citadel
'the kremlin?' is the definition.
(kremlin is a kind of citadel)
'dialect around' is the wordplay.
'around' indicates anagramming the letters.
'dialect' with letters rearranged gives 'CITADEL'.
(Other definitions for citadel that I've seen before include "Fort, fastness" , "Urban fortress" , "Stronghold into which people could go for shelter during a battle" , "place of refuge" , "Keep - castle" .)