Hindsight (10)
I believe the answer is:
retrospect
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hindsight</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for retrospect that I've seen before include "review" , "Look(ing) back" , "Survey of past events" , "A backward view" , "Contemplation of the past" .)