German songs were deceptive to the bitter end! (6)

I believe the answer is:

lieder

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'german songs' is the definition.
(I've seen this before)

I don't understand how the rest of the clue works.

(Other definitions for lieder that I've seen before include "songs by Schumann?" , "Relied on German song genre" , "numbers in German" , "German songs for piano and solo voice" , "Relied on German song (6)." .)

I've seen this clue in the Evening Standard.

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