Ignorant girl has the goods (7)
I believe the answer is:
unaware
'ignorant' is the definition.
(I've seen this before)
'girl has the goods' is the wordplay.
'girl' becomes 'una' (girl's name).
'has' says to put letters next to each other.
'the goods' becomes 'ware' (I've seen this in another clue).
'una'+'ware'='UNAWARE'
(Other definitions for unaware that I've seen before include "Ignorant - unenlightened" , "Unexpected" , "Unknowing" , "Ignorant, oblivious" , "Oblivious to, not knowing" .)