Rebellious daughter visiting loves plant (7)
I believe the answer is:
oregano
'plant' is the definition.
(oregano is a kind of plant)
'rebellious daughter visiting loves' is the wordplay.
'rebellious daughter' becomes 'regan' (I have seen 'Ungrateful daughter' mean 'regan' so perhaps 'daughter' could also mean 'regan'. I am not sure about the 'rebellious' bit.).
'visiting' means one lot of letters goes inside another.
'loves' becomes 'oo' (two O's - 'love' means zero in tennis).
'regan' inserted inside 'oo' is 'OREGANO'.
Can you help me to learn more?
(Other definitions for oregano that I've seen before include "Pizza herb" , "Mediterranean herb" , "Herb used in cookery" , "Pungent seasoning leaves" , "Dried marjoram" .)