Old bean - this is a person from Middle East women's organisation (7)
I believe the answer is:
arabica
If this is the answer I cannot explain how the clue works.
Can you help me to learn more?
(Other definitions for arabica that I've seen before include "Variety of coffee bean" , "hot beverage" , "Type of coffee bean" , "African tree cultivated for coffee" , "sort of bean" .)