Use a tool and slice hot bananas (6)
I believe the answer is:
chisel
'use a tool' is the definition.
'slice hot bananas' is the wordplay.
'hot' becomes 'h'.
'bananas' indicates an anagram (informal term for mad).
'slice'+'h'='sliceh'
'sliceh' with letters rearranged gives 'CHISEL'.
'and' is the link.
(Other definitions for chisel that I've seen before include "It can be cold in the workshop" , "Cutting tool used with hammer" , "Hand tool to shape wood" , "Sculptor's tool" , "Carpentry tool" .)