Crazy suggestion backed eating large dessert (6,5)
I believe the answer is:
banana split
'dessert' is the definition.
(banana split is a kind of dessert)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for banana split that I've seen before include "Ice-cream dish" , "Fruit and ice cream dessert" , "sweet food" , "Ice cream dish" .)