German song wasn't truthful (4)
I believe the answer is:
lied
I believe this clue is a double definition.
'german song' is the first definition.
('song' in German)
'wasn't truthful' is the second definition.
(I've seen this in another clue)
(Other definitions for lied that I've seen before include "Romantic song told a story" , "German air" , "Was economical with the truth" , "German romantic recital piece" , "Told untruths; song" .)