Spotted bananas (5)
I believe the answer is:
dotty
I believe this clue is a double definition.
'spotted' is the first definition.
(thesaurus)
'bananas' is the second definition.
(thesaurus)
(Other definitions for dotty that I've seen before include "Slightly crazy" , "like a Dalmatian?" , "Barking" , "Silly; crazy" , "Feeble-minded" .)