Comes across revolutionary art and poetry (9)

'comes across' is the definition.
(to traverse something is to come across it)

'revolutionary art and poetry' is the wordplay.
'revolutionary' shows that the letters should be reversed in order.
'and' is a charade indicator (letters next to each other).
'poetry' becomes 'verses' (I've seen this in another clue).
'art' reversed gives 'tra'.
'tra'+'verses'='TRAVERSES'