Recovery results in delight round the City (9)
I believe the answer is:
recapture
'recovery' is the definition.
(I've seen this before)
'delight round the city' is the wordplay.
'delight' becomes 'rapture' (I've seen this before**).
'round' is an insertion indicator.
'the city' becomes 'ec' (the City of London postcode).
'rapture' enclosing 'ec' is 'RECAPTURE'.
'results in' acts as a link.
(Other definitions for recapture that I've seen before include "Process of getting back" , "Recover (something taken)" , "Get back" , "Recovery" .)