Fellow appearing repeatedly with a leguminous plant (7)
I believe the answer is:
alfalfa
'leguminous plant' is the definition.
'alfalfa' can be an answer for 'plant' (alfalfa is a kind of plant). I am not sure about the 'leguminous' bit.
'fellow appearing repeatedly with a' is the wordplay.
'fellow appearing' becomes 'alf' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'repeatedly' says to double the letters.
'with' says to put letters next to each other.
'alf' doubled is 'alfalf'.
'alfalf'+'a'='ALFALFA'
Can you help me to learn more?
(Other definitions for alfalfa that I've seen before include "food plant" , "Lucerne, a fodder plant" , "cattle feed" , "odder plant" , "A forage plant" .)