Heavenly bodies (5)
I believe the answer is:
stars
'heavenly bodies' is the definition.
(star is a kind of heavenly body)
This is the entire clue.
(Other definitions for stars that I've seen before include "plays a leading role" , "''What is the ...? What is the ...? '' (Juno and the Paycock)" , "Celebs - constellation" , "Celestial bodies of hot gases" , "Leading actors" .)