Great balls of fire (5)
'great balls of fire' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for stars that I've seen before include "Heavenly bodies" , "Horoscope (colloq.)" , "Leading performers (with stripes?)" , "plays a leading role" , "''What is the ...? What is the ...? '' (Juno and the Paycock)" .)