Caught sight of (6)
I believe the answer is:
espied
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">caught sight of</span>' is the definition.<br/ ><span class="explanation-format__explanation">(espying is a kind of catching sight of)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for espied that I've seen before include "Caught sight of (archaic)" , "observed in literature" , "Glimpsed" , "Spotted; saw" , "Watched" .)