Momentary view (7)
I believe the answer is:
glimpse
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">momentary view</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for glimpse that I've seen before include "Quick view" , "A quick look" , "Glance, catch sight of" , "Brief look" , "Momentary sighting" .)