Decisive defeat
'decisive defeat' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for rout that I've seen before include "Debacle" , "Drubbing" , "Utter defeat" , "Put to flight in disarray" , "Runaway defeat" .)
'decisive defeat' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for waterloo that I've seen before include "Belgian village where Napoleon fell" , "Battle; Abba hit" , "battle in Belgium" , "Seminal European battle of 1815" , "19th century battle" .)