Saw or noticed (8)
I believe the answer is:
observed
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">saw</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">noticed</span>' is the second definition.<br/ ><span class="explanation-format__explanation">('observe' can be a synonym of 'notice')</span><br/ ><br/ ></span>
(Other definitions for observed that I've seen before include "Abided by, rules say" , "Noticed or remarked" , "Said" , "saw" , "Ascertained by sight" .)