Some modern poetry (3)
I believe the answer is:
'poetry' is the definition.
(ode is a type of poem)
'some modern' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'ODE' is hidden in the letters of 'modern'.
(Other definitions for ode that I've seen before include "(Railway)system" , "poetry" , "Poem expressing noble feelings" , "Lyric poem" , "Poetic composition" .)