Hold cake and hold bananas (8)
I believe the answer is:
headlock
'hold' is the definition.
(I know that headlock is a type of lock)
'cake and hold bananas' is the wordplay.
'and' says to put letters next to each other.
'bananas' is an anagram indicator (informal term for mad).
'cake' after 'hold' is 'holdcake'.
'holdcake' anagrammed gives 'HEADLOCK'.
(Other definitions for headlock that I've seen before include "Grip" , "Form of restraint" , "Wrestling hold" , "A way to control" .)