Pea or bean (6)
I believe the answer is:
legume
I believe this is a double definition.
'pea' is the first definition.
(I've seen this before)
'bean' is the second definition.
(I've seen this in another clue)
(Other definitions for legume that I've seen before include "pulse" , "Plant that bears its seeds in a pod" , "Vegetable of pea family" , "Eg, pea, bean plant" , "Pea, bean or lentil?" .)