Standard artistic director required for Bellini opera (5)
I believe the answer is:
norma
'bellini opera' is the definition.
(I've seen this in another clue)
'standard artistic director required' is the wordplay.
'standard' becomes 'norm' (norm is a kind of standard).
'artistic director' becomes 'a' (I am not sure about this - if you are sure you should believe this answer much more).
'required' means one lot of letters go next to another.
'norm'+'a'='NORMA'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for norma that I've seen before include "Operatic work" , "Drawing instrument" , "Outdoor function" , "name for Monroe" , "Bellini work" .)