Modest about some poetry (4)
I believe the answer is:
odes
'poetry' is the definition.
(ode is a type of poem)
'modest about some' is the wordplay.
'some' indicates the answer is hidden within the clue.
'ODES' is hidden in the letters of 'modest about'.
(Other definitions for odes that I've seen before include "To a Skylark, To a Nightingale etc" , "Lays" , "Verses" , "Lyrical poems" , "Poems in praise" .)