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 parts of the word are used).
'ODES' is hidden within '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" .)