Crazy bunch? (7)
I believe the answer is:
bananas
'crazy' is the definition.
(thesaurus)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for bananas that I've seen before include "Fruit; mad" , "bats" , "Fruit - nuts" , "Crazed" , "off 27 [TROLLEY]" .)