Stunned, stupefied (5)
I believe the answer is:
dazed
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">stunned</span>' is the first definition.<br/ ><span class="explanation-format__explanation">('daze' can be a synonym of 'stun')</span><br/ ><br/ >'<span class="explanation-format__original">stupefied</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Other definitions for dazed that I've seen before include "almost out" , "Stupefied" , "Seeing stars?" , "Stunned, confused" , "Stunned or bemused" .)