The remainder get the negotiated rise owing to (7)
I believe the answer is:
residue
'the remainder' is the definition.
(residue means a remainder or remains)
'get the negotiated rise owing to' is the wordplay.
'get' is a charade indicator (letters next to each other).
'the negotiated' indicates anagramming the letters (negotiate can mean to organise or arrange).
'owing to' becomes 'due' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'rise' anagrammed gives 'resi'.
'resi' next to 'due' is 'RESIDUE'.
Can you help me to learn more?
(Other definitions for residue that I've seen before include "Leftovers" , "It remains after other parts have been taken away" , "Matter left behind after other parts have been taken away" , "Whatever is left over" , "balance" .)