Romeo pursing hearts, you might say, and love? (6)
I believe the answer is:
suitor
'love?' is the definition.
(thesaurus)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for suitor that I've seen before include "He pays court to a woman" , "Wooer" , "He woos a maid" , "Prospective husband" , ". . . he woos his girl" .)