Plum variety (6)
I believe the answer is:
choice
I believe this is a double definition.
'plum' is the first definition.
(I've seen this before)
'variety' is the second definition.
(I've seen this before)
(Other definitions for choice that I've seen before include "Select" , "'Selection, option (6)'" , "Sophie's ---, William Styron novel" , "of superior quality" , "Best - selection" .)