Delight in that business that occurred between the Roman general and the Egyptian ruler? (4,6)
I believe the answer is:
love affair
'delight in that business that occurred between the roman general and the egyptian ruler?' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
'delight in that business' is the wordplay.
'delight in' becomes 'love' (I can't explain this - if you can you should give a lot more credence to this answer).
'that business' becomes 'affair' (I've seen this in another clue).
'love'+'affair'='LOVE-AFFAIR'
Can you help me to learn more?
(Other definitions for love affair that I've seen before include "A (short?) romantic relationship" , "Romance" .)