Standard article for a girl (5)
I believe the answer is:
norma
'a girl' is the definition.
'standard article' is the wordplay.
'standard' becomes 'norm' (norm is a kind of standard).
'article' becomes 'a' (the indefinite article in English).
'norm'+'a'='NORMA'
'for' acts as a link.
(Other definitions for norma that I've seen before include "Bellini heroine" , "Operatic lady round the manor" , "name for Monroe" , "- - Jean Baker: Marilyn Monroe" , "Marilyn was properly one" .)