Charge a fee or tax (4)
I believe the answer is:
levy
'charge a fee or tax' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for levy that I've seen before include "Impose a tax, fine, etc" , "Raise - army (or money for it)" , "Money raised from taxes, etc" , "Moneys raised by fines, taxes" , "Charge a fee or tax" .)