Demand protection (6)
I believe the answer is:
charge
I believe this clue is a double definition.
'demand' is the first definition.
(I've seen this before)
'protection' is the second definition.
(charge is a kind of protection)
(Other definitions for charge that I've seen before include "Rush forward in attack" , "money to be paid" , "Amount to pay - attack" , "Accuse - rush - request payment" , "Formal accusation" .)