Lyrical author followed by jerk (6)
I believe the answer is:
poetic
'lyrical' is the definition.
(I've seen this before)
'author followed by jerk' is the wordplay.
'author' becomes 'Poe' (Edgar Allan Poe).
'followed by' says to put letters next to each other.
'jerk' becomes 'tic' (jerking movement by the body).
'poe'+'tic'='POETIC'
(Other definitions for poetic that I've seen before include "Beautiful - imaginative" , "Having rhythm and beauty" , "Characterised by romantic imagery" , "Lyrical like verse" , "Imaginative; like verse" .)