Crossword Genius

Battle song (8)

Ross

I believe the answer is:

waterloo

This clue is a double definition.

'battle' is the first definition.
(1815 battle)

'song' is the second definition.
(ABBA song)

(Other definitions for waterloo that I've seen before include "Napoleon's 1815 defeat" , "Downfall of Napoleon" , "Signal failure for French" , "Where Napoleon met his final defeat" , "6D 5A [TUBE STATION]" .)

I've seen this clue in The Guardian and The Telegraph.
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