Girl India put in goal (4)
I believe the answer is:
enid
'girl' is the definition.
(girl's name)
'india put in goal' is the wordplay.
'india' becomes 'i' (phonetic alphabet: alpha, bravo, charlie etc.).
'put in' means one lot of letters goes inside another.
'goal' becomes 'end' (both can mean a purpose).
'i' inserted inside 'end' is 'ENID'.
(Other definitions for enid that I've seen before include "'... Blyton, children's author (4)'" , "- Blyton, children's writer" , "& 18 Down Children's author" , "Dine out on this girl's name also" , "Arthurian wife" .)