Poetry by awful dose (4)
I believe the answer is:
odes
'poetry' is the definition.
(ode is a type of poem)
'awful dose' is the wordplay.
'awful' indicates anagramming the letters.
'dose' with letters rearranged gives 'ODES'.
'by' acts as a link.
(Other definitions for odes that I've seen before include "Lines" , "Lyrical poems" , "poetry" , "Songs" , "Lays" .)