Empty terminals around diametrically opposite points (9)
I believe the answer is:
antipodes
'empty terminals' is the definition.
Although both the answer and definition are plural nouns, I can't see how they can define each other.
'around diametrically opposite points' is the wordplay.
'around' indicates putting letters inside.
'diametrically' becomes 'pod' (I can't explain this - if you can you should believe this answer much more).
'opposite' becomes 'anti'.
'points' becomes 'Es' (two compass points).
'anti'+'es'='anties'
'pod' going within 'anties' is 'ANTIPODES'.
Can you help me to learn more?
(Other definitions for antipodes that I've seen before include "Exact opposites" , "Do panties (anag.)" , "home for Anzacs" , "Diametrically opposite location" , "Australia and New Zealand, to Britain" .)