Dislike current lines by bard (3,4)
I believe the answer is:
ill will
'dislike' is the definition.
(I've seen this before)
'current lines by bard' is the wordplay.
'current' becomes 'I' (symbol for electric current).
'lines' becomes 'll' (two abbreviations for line).
'by' is a charade indicator (letters next to each other).
'bard' becomes 'will' (William Shakespeare).
'i'+'ll'+'will'='ILL-WILL'
(Other definitions for ill will that I've seen before include "Disposition of enemy" , "Positively unfriendly disposition" , "Enmity" , "Animosity, hostile feeling" , "Bitterness" .)