Girl — colour (5)
I believe the answer is:
olive
I believe this clue is a double definition.
'girl' is the first definition.
(girl's name)
'colour' is the second definition.
(I know that olive is a type of green)
(Other definitions for olive that I've seen before include "This branch is offered in peace gesture" , "A Med. fruit" , "Oil producer" , "Oil-producing fruit" , "I love this fruit" .)