Some good essays or poems (4)
I believe the answer is:
odes
'poems' is the definition.
(ode is a kind of poem)
'some good essays or' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'ODES' can be found hidden inside 'good essays or'.
(Other definitions for odes that I've seen before include "Lyrical poems" , "Lyric poems" , "Songs" , "To a Skylark, To a Nightingale etc" , "Keats was fond of them" .)