Mum enjoys life around 500 islands (8)
I believe the answer is:
maldives
'islands' is the definition.
(island nation)
'mum enjoys life around 500' is the wordplay.
'mum' becomes 'ma' (ma can mean mother).
'enjoys life' becomes 'lives' (I am not sure about this - if you are sure you should believe this answer much more).
'around' means one lot of letters goes inside another.
's00' becomes 'd' (Roman numeral for s00).
'lives' enclosing 'd' is 'ldives'.
'ma'+'ldives'='MALDIVES'
Can you help me to learn more?
(Other definitions for maldives that I've seen before include "Mad Elvis is here in the Indian ocean" , "Indian Ocean archipelago and republic" , "Mad Elvis found in the islands" , "Mad Elvis might be in the islands" , "holiday destination" .)