Container broken by mad macho driver (8)
I believe the answer is:
coachman
'driver' is the definition.
(coachman is a kind of driver)
'container broken by mad macho' is the wordplay.
'container' becomes 'can' (can is a kind of container**).
'broken by' is an insertion indicator.
'mad' indicates anagramming the letters.
'macho' anagrammed gives 'oachm'.
'can' placed around 'oachm' is 'COACHMAN'.
(Other definitions for coachman that I've seen before include "Horse-drawn carriage driver" , "used to appear on the box" , "Wagoner" .)