Locally fertile source of popular music? (5)
I believe the answer is:
oasis
'locally fertile source' is the definition.
'oasis' can be an answer for 'source' (I have seen 'source of water' mean 'oasis' so perhaps 'source' could also mean 'oasis'). I'm not certain of the 'locally fertile' bit.
'of popular music?' is the wordplay.
'of' becomes 'o''.
'popular music?' becomes 'asis' (I am not sure about this - if you are sure you should believe this answer much more).
'o'+'asis'='OASIS'
Can you help me to learn more?
(Other definitions for oasis that I've seen before include "Green spot; rock group" , "flower arranging stuff" , "Manchester band featuring the Gallagher brothers" , "retreat" , "Britpop group" .)