Lover E (10)
I believe the answer is:
sweetheart
'lover' is the definition.
(I know that sweetheart is a type of lover)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for sweetheart that I've seen before include "Juliet had one" , "Beloved" , "One loved" , "Dear" , "Love" .)