Chaotic state (8)
'chaotic state' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for shambles that I've seen before include "confused situation" , "Butchery - chaos" , "Scene of slaughter or disorder" , "Total mess" , "State of total disorder" .)
(Other definitions for snafu that I've seen before include "mess as usual" , "Mess table" , "chaos, as usual" , "Chaotic state, mess" , "Customary confusion" .)