Quick look or glance (5)
I believe the answer is:
dekko
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">quick look</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">glance</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ ></span>
(Other definitions for dekko that I've seen before include "Shufti" , "Look-see" , "Butcher's" , "Quick glance (informal)" , "Quick look or glance" .)