Queen of heaven (4)
I believe the answer is:
hera
'queen of heaven' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hera that I've seen before include "Sister and wife of 18" , "Jealous sister and wife of Zeus" , "female Greek deity" , "Greek queen of Olympian gods" , "Greek equivalent of Juno" .)