City still rapturous (8)
I believe the answer is:
ecstatic
'rapturous' is the definition.
('ecstatic' can be a synonym of 'rapturous')
'city still' is the wordplay.
'city' becomes 'ec' (the City of London postcode).
'still' becomes 'static' ('static' can be a synonym of 'still').
'ec'+'static'='ECSTATIC'
(Other definitions for ecstatic that I've seen before include "Blissful" , "Emotionally exalted" , "in seventh heaven" , "elated" , "high!" .)