This girl may provide average answer! (5)
I believe the answer is:
norma
'this girl may' is the definition.
'Norma' can be an answer for 'girl'. I'm not certain of the remainder of the definition.
'average answer' is the wordplay.
'average' becomes 'norm' (synonyms).
'answer' becomes 'a' (abbreviation eg in Q and A).
'norm'+'a'='NORMA'
'provide' is the link.
Can you help me to learn more?
(Other definitions for norma that I've seen before include "small group of stars" , "Girl" , "She incited Gauls v. Romans (Bellini)" , "Roman (anag) - girl's name" , "Opera - ex-PM's wife" .)