Used the wrong words for a song! (4)
I believe the answer is:
lied
'song' is the definition.
(type of German song)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for lied that I've seen before include "piece of music" , "Deceived with words" , "Told an untruth" , "refused to admit it" , "Song in Berlin" .)