Roman goddess, protector of marriage (4)

I believe the answer is:

juno

(Other definitions for juno that I've seen before include "Jupiter's wife" , "In Roman myth, goddess ofmarriage - to Paycock?" , "She played with the Paycock" , ". . . . and the Paycock (Sean O'Casey)" , "Roman queen of the gods, wife and sister of Jupiter" .)

I've seen this clue in The Guardian.

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