City still delighted (8)
I believe the answer is:
ecstatic
'delighted' is the definition.
(I've seen this before)
'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 "Cock-a-hoop" , "high!" , "Thrilled and overjoyed" , "Overjoyed, quite delighted" , "In a state of great delight" .)