Plums and biscuits (8)
I believe the answer is:
crackers
I believe this is a double definition.
'plums' is the first definition.
(plum and cracker can both mean something excellent)
'biscuits' is the second definition.
(I've seen this before)
'and' is the link.
(Other definitions for crackers that I've seen before include "Christmas items" , "Thin biscuits for cheese" , "nuts and > bananas" , "and some others touched" , "Crazy (colloq.); biscuits" .)