Go to court about Spanish agreement for girl (5)
I believe the answer is:
susie
'girl' is the definition.
'go to court about spanish agreement' is the wordplay.
'go to court' becomes 'sue' (I've seen this in another clue).
'about' indicates putting letters inside.
'spanish agreement' becomes 'si' (Spanish for yes).
'sue' placed around 'si' is 'SUSIE'.
'for' is the link.
(Other definitions for susie that I've seen before include "Woman" , "Wake Up Little - (Everly Brothers)" , "Little Susannah" , "Girl" , "Old song: ''If you knew . . . . . like I know . . . . .''" .)