Reunited to produce a profit for a female (8,5)

'reunited to' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.

'a profit for a female' is the wordplay.
'profit' becomes 'gain' (synonyms).
'for' means one lot of letters go next to another (I've seen this in other clues).
'a female' becomes 'together' (I can't explain this - if you can you should believe this answer much more).
'a'+'gain'='again'
'again' after 'together' is 'TOGETHER AGAIN'.

'produce' is the link.

Can you help me to learn more?