Prices (5)
I believe the answer is:
costs
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">prices</span>' is the definition.<br/ ><span class="explanation-format__explanation">('cost' can be a synonym of 'price')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for costs that I've seen before include "Expenditure" , "Fees" , "Charges" , "Damages" , "is expensive" .)