English singer inside my diplomatic residence (7)
I believe the answer is:
embassy
'diplomatic residence' is the definition.
(I've seen this before)
'english singer inside my' is the wordplay.
'english' becomes 'e' (abbreviation).
'singer' becomes 'bass' (bass is a kind of singer).
'inside' means one lot of letters goes inside another.
'bass' going inside 'my' is 'mbassy'.
'e'+'mbassy'='EMBASSY'
(Other definitions for embassy that I've seen before include "Consulate" , "Where an ambassador lives or works" , "Ambassador's residence" , "Ambassador's office" , "Legation" .)