Reportedly ring sweetheart (4)
I believe the answer is:
beau
This clue could be a double definition.
'reportedly ring' is the first definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'sweetheart' is the second definition.
(beau can mean a sweetheart or lover)
Can you help me to learn more?
(Other definitions for beau that I've seen before include "Fop; lover" , "An old boy friend like Brummel?" , "Dandy - attentive companion" , "An old boy friend or dandy" , "French boyfriend" .)