State of a girl (8)
I believe the answer is:
virginia
I believe this clue is a double definition.
'state' is the first definition.
(I know that Virginia is a state)
'a girl' is the second definition.
'of' acts as a link.
(Other definitions for virginia that I've seen before include "One of the Confederate States in the American Civil War" , "US state, home of the Blue Ridge Mountains" , "Richmond's state" , "State named for the first Elizabeth" , "US East coast state" .)