The price of freedom? (6)
I believe the answer is:
ransom
'the price of freedom?' is the definition.
(price of freedom demanded by a kidnapper)
This is the entire clue.
(Other definitions for ransom that I've seen before include "Payment for the release of someone" , "Payment, eg to kidnapper" , "Money paid for release of a hostage" , "Redeem" , "Romans (anag)" .)