Song that gave a false impression (4)
I believe the answer is:
lied
I believe this clue is a double definition.
'song' is the first definition.
(type of German song)
'gave a false impression' is the second definition.
(I've seen this before)
'that' acts as a link.
(Other definitions for lied that I've seen before include "Spoke falsely" , "Produced pork pie" , "German art song" , "Told stories" , "untrue" .)