Fire and unload (9)
I believe the answer is:
discharge
This clue is a double definition.
'fire' is the first definition.
(synonyms)
'unload' is the second definition.
(I've seen this before)
'and' acts as a link.
(Other definitions for discharge that I've seen before include "meet" , "Performance" , "Sack or fire weapon" , "cashier" , "Fire (gun); sack (worker)" .)