Go crazy and take four bananas (5,3)
I believe the answer is:
freak out
'go crazy' is the definition.
The definition and answer can be both to do with human feelings as well as being verbs in their base form.
Maybe there's an association between them I don't understand?
'take four bananas' is the wordplay.
'bananas' is an anagram indicator (informal term for mad).
'take'+'four'='takefour'
'takefour' anagrammed gives 'FREAK-OUT'.
'and' is the link.
Can you help me to learn more?
(Other definitions for freak out that I've seen before include "Lose emotional control" , "Lose one's nerve" , "Get into a heightened emotional state" , "React wildly and irrationally" , "Behave irrationally" .)