Sinatra excited empress (7)
I believe the answer is:
tsarina
'empress' is the definition.
(I know that tsarina is a type of empress)
'sinatra excited' is the wordplay.
'excited' indicates anagramming the letters.
'sinatra' is an anagram of 'TSARINA'.
(Other definitions for tsarina that I've seen before include "lady of some importance" , "Russian empress (S, not Z)" , "Monarch" , "Nicholas's wife" , "top Russian women" .)