Jupiter's wife (4)
I believe the answer is:
juno
'jupiter's wife' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for juno that I've seen before include "In Roman myth, goddess ofmarriage - to Paycock?" , "Jupiter's wife" , "Roman queen of the gods, wife and sister of Jupiter" , "Fourth largest known asteroid" , ". . . . and the Paycock (Sean O'Casey)" .)