Entertainment offering some hope for an artist (5)
I believe the answer is:
opera
'entertainment' is the definition.
(I've seen this before)
'offering some hope for an artist' is the wordplay.
'some' suggests taking the first letters.
'hope for' becomes 'pe' (I can't justify this - if you can you should believe this answer much more).
'an artist' becomes 'RA' (Royal Academician, member of Royal Academy of Arts).
The initial letter of 'offering' is 'o'.
'o'+'pe'+'ra'='OPERA'
Can you help me to learn more?
(Other definitions for opera that I've seen before include "Musical works" , "Eg, Der Rosenkavalier" , "Met show?" , "Drama or comedy set to music" , "Grand or comic work?" .)