Oblique art about poetry (8)
I believe the answer is:
traverse
'oblique' is the definition.
(thesaurus)
'art about poetry' is the wordplay.
'about' says the letters should be written backwards.
'poetry' becomes 'verse' (synonyms).
'art' back-to-front is 'tra'.
'tra'+'verse'='TRAVERSE'
(Other definitions for traverse that I've seen before include "cover" , "Cross sideways" , "Extend or bridge across" , "In mountaineering, a steep slope to be crossed from side to side" , "Travel across or pass over" .)