Fixed price (4)
I believe the answer is:
rate
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fixed price</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for rate that I've seen before include "Severely criticise - speed" , "Capital of the Philippines" , "Measure of frequency; merit" , "Pace" , "See 12" .)