To be paid nothing by section of political party, perhaps? (5)
I believe the answer is:
owing
'to be paid' is the definition.
(eg an unpaid bill is owing)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for owing that I've seen before include "Unpaid" , "Still outstanding" , "Outstanding as a debt" , "(Of money) outstanding" , "Due to, like debt" .)