"A Raisin in the Sun" star Ruby (3)
I believe the answer is:
dee
'a raisin in the sun star ruby' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for dee that I've seen before include "Chester's river" , "John ---, Elizabethan mage" , "Balmoral's river" , "Name of many rivers" , "Aberdeenshire river" .)