Crazy for cashews, say (4)
I believe the answer is:
nuts
I believe this is a double definition.
'crazy' is the first definition.
(nuts can informally mean crazy or mad)
'for cashews say' is the second definition.
(cashew is a kind of nut)
(Other definitions for nuts that I've seen before include "Fruit - bananas!" , "Crazy (sl.)" , "Mast - mad" , "Crazy; food" , "Mad - hard fruits" .)