A variable list on poems down under (9)
I believe the answer is:
antipodes
'down under' is the definition.
(I've seen this before)
'a variable list on poems' is the wordplay.
'variable' becomes 'n' (n can represent any number in mathematics).
'list' becomes 'tip' (both can mean to lean or incline).
'on' says to put letters next to each other.
'poems' becomes 'odes' (ode is a kind of poem).
'a'+'n'+'tip'+'odes'='ANTIPODES'
(Other definitions for antipodes that I've seen before include "Does it pan out" , "places poles apart?" , "Opposite sides of a sphere: Down Under" , "Australia and New Zealand viewed from Europe" , "Regions on diametrically opposite sides of the Earth" .)