The whole (3)
'the whole' is the definition.
(all of something)
This is all the clue.
(Other definitions for all that I've seen before include "Everything or everyone" , "and 16 Across and 23 Across: Even so" , "Straight garden path" , "100%" , "Avenue, walk or garden path" .)
(Other definitions for shebang that I've seen before include "The entire system" , "Whole affair" , "affair in America" , "The whole thing?" , "Lot" .)