The music was deceptive (4)
I believe the answer is:
lied
'the music' is the definition.
(lied is a kind of music)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for lied that I've seen before include "gave a false impression" , "Stated falsely" , "Told untruths; song" , "Told tale" , "Idle (anag.)" .)