All over the place (8)
(Other definitions for anywhere that I've seen before include "no specific venue" , "In an unspecified location" , "At no specified place" , "In whichever place" , "The place doesn't matter" .)
(Other definitions for messy that I've seen before include "Untidy, dirty" , "Disorganised" , "Dirty and disorderly" .)
'all over the place' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for amok that I've seen before include "(Run) wild, out of control" , "Run (disruptively out of control)" , "Wild and uncontrollable" , "crazy" , "'Wildly, without self-control (4)'" .)