End of marriage, odd divorce (8)
I believe the answer is:
estrange
'divorce' is the definition.
(I've seen this before)
'end of marriage odd' is the wordplay.
'end of marriage' becomes 'e' (I can't explain this - if you can you should believe this answer much more).
'odd' becomes 'strange' (I've seen this in another clue).
'e'+'strange'='ESTRANGE'
Can you help me to learn more?
(Other definitions for estrange that I've seen before include "Lose friendship" , "Make enemy of sergeant" , "drive apart" , "Alienate from friendship" , "Become unfriendly towards sergeant" .)