Lawn flower (5)
I believe the answer is:
daisy
'lawn flower' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for daisy that I've seen before include "Plant; girl's name" , "bloomer" , "Old song: '. . . . ., . . . . . give me your answer, do'" , "Lawn flower, weed" , "Grassland plant" .)