German song didn't tell the truth (4)
I believe the answer is:
lied
This clue is a double definition.
'german song' is the first definition.
('song' in German)
'didn't tell the truth' is the second definition.
(I've seen this in another clue)
(Other definitions for lied that I've seen before include "refused to admit it" , "Was economical with the truth" , "Idle (anag.)" , "German romantic recital piece" , "German air" .)