Diabolical song seduces: attempt to anticipate? (6-5)
I believe the answer is:
second-guess
'attempt to anticipate?' is the definition.
(I've seen this before)
'diabolical song seduces' is the wordplay.
'diabolical' indicates anagramming the letters.
'song'+'seduces'='songseduces'
'songseduces' with letters rearranged gives 'SECOND-GUESS'.
(Other definitions for second-guess that I've seen before include "Attempt to anticipate or predict" , "Anticipate (someone's action)" .)