Astonished look (5)
I believe the answer is:
stare
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">astonished look</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for stare that I've seen before include "bird" , "Gaze fixedly" , "Long fixed look" , "Rates (anag.)" , "Look with fixed gaze" .)