Songstress covers Help in this city (8)
I believe the answer is:
adelaide
'this city' is the definition.
(Adelaide is an example)
'songstress covers help in' is the wordplay.
'songstress covers' becomes 'dela' (I can't explain this - if you can you should give a lot more credence to this answer).
'help' becomes 'aide' (aide is a kind of help).
'in' means one lot of letters goes inside another.
'dela' placed into 'aide' is 'ADELAIDE'.
Can you help me to learn more?
(Other definitions for adelaide that I've seen before include "South Australia's capital" , "State capital of South Australia" , "Queen to William IV - setting for many an 6 test" , "Girl" , "old consort" .)