The odd dose of poetry? (4)
I believe the answer is:
odes
'poetry?' is the definition.
(ode is a type of poem)
'the odd dose' is the wordplay.
'the odd' indicates anagramming the letters (I've seen 'the odds' mean this (letters in odd-numbered positions are used)).
'dose' is an anagram of 'ODES'.
'of' acts as a link.
(Other definitions for odes that I've seen before include "Keats was fond of them" , "Lines" , "Poets write them" , "verse" , "Poems in praise" .)