Noticed, spotted (6)
I believe the answer is:
espied
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">noticed</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >'<span class="explanation-format__original">spotted</span>' is the second definition.<br/ ><span class="explanation-format__explanation">('espy' can be a synonym of 'spot')</span><br/ ><br/ ></span>
(Other definitions for espied that I've seen before include "Watched" , "observed in literature" , "Spotted; saw" , "Saw (archaic)" , "Caught sight of (archaic)" .)