Obsessive about this odd school on the other side of the world (9)
I believe the answer is:
antipodal
'obsessive' is the definition.
Both the answer and definition are adjectives. Maybe you can see a link between them that I don't see?
'this odd school on the other side of the world' is the wordplay.
'odd' means one should take alternating letters.
'school' becomes 'pod' (term for a group of marine mammals).
'on' is an insertion indicator.
'the other side of the world' becomes 'anal' (I can't explain this - if you can you should give a lot more credence to this answer).
The alternate letters of 'this' are 'ti'.
'ti'+'pod'='tipod'
'tipod' inserted into 'anal' is 'ANTIPODAL'.
'about' acts as a link.
Can you help me to learn more?
(Other definitions for antipodal that I've seen before include "in NZ, say" , "Opposite" .)