One is entertained by flower girl (5)
I believe the answer is:
rosie
'girl' is the definition.
(girl's name)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for rosie that I've seen before include "Cider with - (Laurie Lee)" , "-- Lee is slang for tea" , "- - Lee (sl.)" , "Girl's name" , "Char" .)