Approximation (8)
I believe the answer is:
estimate
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">approximation</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that approximation can be written as estimate)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for estimate that I've seen before include "Likely amount" , "approximate price" , "damage" , "Judge to be probable" , "Judge the worth of" .)