Rattletrap (6)
(Other definitions for jalopy that I've seen before include "heap" , "A battered old car" , "Rundown old car" , "Dilapidated old car" , "old crate" .)
'rattletrap' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for beater that I've seen before include "One raising game birds" , "Game employee" , "Game raiser at a shoot" , "Disturber of game birds" , "guy rousing game" .)