Fat entertaining couple after start of spat? This ends the argument (4,4)
I believe the answer is:
last word
'this ends the argument' is the definition.
(as in having the last word)
'fat entertaining couple after start of spat?' is the wordplay.
'fat entertaining couple' becomes 'last' (I can't explain this - if you can you should believe this answer much more).
'after' is a charade indicator (letters next to each other).
'start of' means to remove the last letter.
'spat?' becomes 'words' (spat is a kind of words).
'words' with its last letter taken off is 'word'.
'last'+'word'='LAST WORD'
Can you help me to learn more?
(Other definitions for last word that I've seen before include "Final remark in argument" , "this is finally put across" , "It's state-of-the-art" , "Dernier cri" , "Amen" .)