Girl charged nothing at first (5)
I believe the answer is:
olive
'girl' is the definition.
'charged nothing at first' is the wordplay.
'charged' becomes 'live' (I've seen this in other clues).
'nothing' becomes 'o' (looks like zero - 0).
'at first' means one lot of letters go next to another.
'live' put after 'o' is 'OLIVE'.
(Other definitions for olive that I've seen before include "Stoned fruit" , "yellowish green" , "Fruit, source of oil" , "Yellowish-green colour" , "Small green Mediterranean tree-fruit (5)" .)