Leave fruit and become mad (2,7)
I believe the answer is:
go bananas
'become mad' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.
'leave fruit' is the wordplay.
'leave' becomes 'go'.
'fruit' becomes 'bananas' (I've seen this before).
'go'+'bananas'='GO BANANAS'
'and' acts as a link.
Can you help me to learn more?
(Other definitions for go bananas that I've seen before include "Lose one's cool" , "Get very annoyed" , "Show enthusiasm" , "Flip one's lid (sl.)" , "become very angry" .)