Opera star, new in Norma, paid outrageously (5,5)
I believe the answer is:
prima donna
'opera star' is the definition.
(prima donna is a kind of opera star)
'new in norma paid outrageously' is the wordplay.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'in' indicates putting letters inside.
'outrageously' is an anagram indicator.
'norma'+'paid'='normapaid'
'normapaid' anagrammed gives 'primadona'.
'n' going into 'primadona' is 'PRIMA DONNA'.
(Other definitions for prima donna that I've seen before include "Diva" , "a right madam?" , "Leading lady, proverbially temperamental" , "Female opera star" , "Very self-important person" .)