Committed perjury (4)
I believe the answer is:
lied
'committed perjury' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for lied that I've seen before include "Song in Berlin" , "conveyed a false impression" , "Romantic song told a story" , "Told untruths; song" , "German air" .)